mirror of
https://github.com/samba-team/samba.git
synced 2025-02-28 01:58:17 +03:00
this new cgi code includes the ability to act as a mini web server,
allowing people to use web configuration of Samba without installing a web server (This used to be commit b4e05c360e77cbf27a95920b613bfe6bc874ea1b)
This commit is contained in:
Andrew Tridgell
parent
a5d239e873
commit
8d971f1db1
589
source3/cgi.c
589
source3/cgi.c
@ -1,6 +1,4 @@
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/*
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Unix SMB/Netbios implementation.
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Version 1.9.
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some simple CGI helper routines
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Copyright (C) Andrew Tridgell 1997
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@ -20,9 +18,19 @@
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*/
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#include "includes.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <pwd.h>
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#define MAX_VARIABLES 512
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#define MAX_VARIABLES 10000
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#ifdef DEBUG_COMMENTS
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extern void print_title(char *fmt, ...);
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#endif
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struct var {
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char *name;
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@ -31,14 +39,60 @@ struct var {
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static struct var variables[MAX_VARIABLES];
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static int num_variables;
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static int content_length;
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static int request_post;
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static int request_get;
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static char *query_string;
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static int grab_line(int *cl, char *line, int maxsize)
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static void unescape(char *buf)
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{
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char *p=buf;
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while ((p=strchr(p,'+')))
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*p = ' ';
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p = buf;
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while (p && *p && (p=strchr(p,'%'))) {
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int c1 = p[1];
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int c2 = p[2];
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if (c1 >= '0' && c1 <= '9')
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c1 = c1 - '0';
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else if (c1 >= 'A' && c1 <= 'F')
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c1 = 10 + c1 - 'A';
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else if (c1 >= 'a' && c1 <= 'f')
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c1 = 10 + c1 - 'a';
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else {p++; continue;}
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if (c2 >= '0' && c2 <= '9')
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c2 = c2 - '0';
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else if (c2 >= 'A' && c2 <= 'F')
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c2 = 10 + c2 - 'A';
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else if (c2 >= 'a' && c2 <= 'f')
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c2 = 10 + c2 - 'a';
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else {p++; continue;}
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*p = (c1<<4) | c2;
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memcpy(p+1, p+3, strlen(p+3)+1);
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p++;
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}
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}
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static char *grab_line(FILE *f, int *cl)
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{
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char *ret;
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int i = 0;
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int len = 1024;
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ret = (char *)malloc(len);
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if (!ret) return NULL;
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while ((*cl)) {
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int c = fgetc(stdin);
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int c = fgetc(f);
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(*cl)--;
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if (c == EOF) {
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@ -46,98 +100,140 @@ static int grab_line(int *cl, char *line, int maxsize)
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break;
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}
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if (c == '+') {
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c = ' ';
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}
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if (c == '\r') continue;
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if (strchr("\n&", c)) break;
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if (c == '%' && (*cl) >= 2) {
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int c1, c2;
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c1 = fgetc(stdin);
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c2 = fgetc(stdin);
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(*cl) -= 2;
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if (c1 == EOF || c2 == EOF) break;
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if (c1 >= '0' && c1 <= '9')
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c1 = c1 - '0';
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else if (c1 >= 'A' && c1 <= 'F')
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c1 = 10 + c1 - 'A';
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else if (c1 >= 'a' && c1 <= 'f')
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c1 = 10 + c1 - 'a';
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else break;
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ret[i++] = c;
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if (c2 >= '0' && c2 <= '9')
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c2 = c2 - '0';
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else if (c2 >= 'A' && c2 <= 'F')
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c2 = 10 + c2 - 'A';
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else if (c2 >= 'a' && c2 <= 'f')
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c2 = 10 + c2 - 'a';
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else break;
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c = (c1<<4) | c2;
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if (i == len-1) {
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char *ret2;
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ret2 = (char *)realloc(ret, len*2);
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if (!ret2) return ret;
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len *= 2;
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ret = ret2;
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}
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line[i++] = c;
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if (i == maxsize) break;
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}
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/* now unescape the line */
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line[i] = 0;
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return 1;
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ret[i] = 0;
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return ret;
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}
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/***************************************************************************
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load all the variables passed to the CGI program
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load all the variables passed to the CGI program. May have multiple variables
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with the same name and the same or different values. Takes a file parameter
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for simulating CGI invocation eg loading saved preferences.
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***************************************************************************/
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void cgi_load_variables(void)
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void cgi_load_variables(FILE *f1)
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{
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static pstring line;
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char *p;
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FILE *f = f1;
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static char *line;
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char *p, *s, *tok;
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int len;
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if (!(p=getenv("CONTENT_LENGTH"))) return;
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len = atoi(p);
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if (len <= 0) return;
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while (len && grab_line(&len, line, sizeof(line)-1)) {
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p = strchr(line,'=');
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if (!p) continue;
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*p = 0;
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variables[num_variables].name = strdup(line);
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variables[num_variables].value = strdup(p+1);
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if (!variables[num_variables].name ||
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!variables[num_variables].value)
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continue;
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#if 0
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printf("%s=%s<br>\n",
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variables[num_variables].name,
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variables[num_variables].value);
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#ifdef DEBUG_COMMENTS
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char dummy[100]="";
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print_title(dummy);
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printf("<!== Start dump in cgi_load_variables() %s ==>\n",__FILE__);
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#endif
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num_variables++;
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if (num_variables == MAX_VARIABLES) break;
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if (!f1) {
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f = stdin;
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if (!content_length) {
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p = getenv("CONTENT_LENGTH");
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len = p?atoi(p):0;
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} else {
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len = content_length;
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}
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} else {
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fseek(f, 0, SEEK_END);
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len = ftell(f);
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fseek(f, 0, SEEK_SET);
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}
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if (len > 0 &&
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(f1 || request_post ||
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((s=getenv("REQUEST_METHOD")) &&
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strcasecmp(s,"POST")==0))) {
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while (len && (line=grab_line(f, &len))) {
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p = strchr(line,'=');
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if (!p) continue;
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*p = 0;
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variables[num_variables].name = strdup(line);
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variables[num_variables].value = strdup(p+1);
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free(line);
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if (!variables[num_variables].name ||
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!variables[num_variables].value)
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continue;
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unescape(variables[num_variables].value);
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unescape(variables[num_variables].name);
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#ifdef DEBUG_COMMENTS
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printf("<!== POST var %s has value \"%s\" ==>\n",
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variables[num_variables].name,
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variables[num_variables].value);
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#endif
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num_variables++;
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if (num_variables == MAX_VARIABLES) break;
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}
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}
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if (f1) {
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#ifdef DEBUG_COMMENTS
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printf("<!== End dump in cgi_load_variables() ==>\n");
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#endif
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return;
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}
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fclose(stdin);
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if ((s=query_string) || (s=getenv("QUERY_STRING"))) {
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for (tok=strtok(s,"&;");tok;tok=strtok(NULL,"&;")) {
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p = strchr(tok,'=');
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if (!p) continue;
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*p = 0;
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variables[num_variables].name = strdup(tok);
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variables[num_variables].value = strdup(p+1);
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if (!variables[num_variables].name ||
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!variables[num_variables].value)
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continue;
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unescape(variables[num_variables].value);
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unescape(variables[num_variables].name);
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#ifdef DEBUG_COMMENTS
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printf("<!== Commandline var %s has value \"%s\" ==>\n",
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variables[num_variables].name,
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variables[num_variables].value);
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#endif
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num_variables++;
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if (num_variables == MAX_VARIABLES) break;
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}
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}
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#ifdef DEBUG_COMMENTS
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printf("<!== End dump in cgi_load_variables() ==>\n");
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#endif
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}
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/***************************************************************************
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find a variable passed via CGI
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Doesn't quite do what you think in the case of POST text variables, because
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if they exist they might have a value of "" or even " ", depending on the
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browser. Also doesn't allow for variables[] containing multiple variables
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with the same name and the same or different values.
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***************************************************************************/
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char *cgi_variable(char *name)
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{
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@ -149,6 +245,15 @@ char *cgi_variable(char *name)
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return NULL;
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}
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/***************************************************************************
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return a particular cgi variable
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***************************************************************************/
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char *cgi_vnum(int i, char **name)
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{
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if (i < 0 || i >= num_variables) return NULL;
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*name = variables[i].name;
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return variables[i].value;
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}
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/***************************************************************************
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return the value of a CGI boolean variable.
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@ -161,3 +266,341 @@ int cgi_boolean(char *name, int def)
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return strcmp(p, "1") == 0;
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}
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/***************************************************************************
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like strdup() but quotes < > and &
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***************************************************************************/
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char *quotedup(char *s)
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{
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int i, n=0;
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int len;
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char *ret;
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char *d;
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if (!s) return strdup("");
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len = strlen(s);
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for (i=0;i<len;i++)
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if (s[i] == '<' || s[i] == '>' || s[i] == '&')
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n++;
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ret = malloc(len + n*6 + 1);
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if (!ret) return NULL;
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d = ret;
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for (i=0;i<len;i++) {
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switch (s[i]) {
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case '<':
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strcpy(d, "<");
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d += 4;
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break;
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case '>':
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strcpy(d, ">");
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d += 4;
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break;
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case '&':
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strcpy(d, "&");
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d += 5;
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break;
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default:
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*d++ = s[i];
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}
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}
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*d = 0;
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return ret;
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}
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/***************************************************************************
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like strdup() but quotes a wide range of characters
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***************************************************************************/
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char *urlquote(char *s)
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{
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int i, n=0;
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int len;
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char *ret;
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char *d;
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char *qlist = "\"\n\r'&<> \t+;";
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if (!s) return strdup("");
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len = strlen(s);
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for (i=0;i<len;i++)
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if (strchr(qlist, s[i])) n++;
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ret = malloc(len + n*2 + 1);
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if (!ret) return NULL;
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d = ret;
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for (i=0;i<len;i++) {
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if (strchr(qlist,s[i])) {
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sprintf(d, "%%%02X", (int)s[i]);
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d += 3;
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} else {
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*d++ = s[i];
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}
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}
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*d = 0;
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return ret;
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}
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/***************************************************************************
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like strdup() but quotes " characters
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***************************************************************************/
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char *quotequotes(char *s)
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{
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int i, n=0;
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int len;
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char *ret;
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char *d;
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if (!s) return strdup("");
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len = strlen(s);
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for (i=0;i<len;i++)
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if (s[i] == '"')
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n++;
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ret = malloc(len + n*6 + 1);
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if (!ret) return NULL;
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d = ret;
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for (i=0;i<len;i++) {
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switch (s[i]) {
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case '"':
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strcpy(d, """);
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d += 6;
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break;
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default:
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*d++ = s[i];
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}
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}
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*d = 0;
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return ret;
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}
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/***************************************************************************
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quote spaces in a buffer
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***************************************************************************/
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void quote_spaces(char *buf)
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{
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while (*buf) {
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if (*buf == ' ') *buf = '+';
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buf++;
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}
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}
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/***************************************************************************
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tell a browser about a fatal error in the http processing
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***************************************************************************/
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static void cgi_setup_error(char *err, char *header, char *info)
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{
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printf("HTTP/1.1 %s\r\n%sConnection: close\r\nContent-Type: text/html\r\n\r\n<HTML><HEAD><TITLE>%s</TITLE></HEAD><BODY><H1>%s</H1>%s<p></BODY></HTML>\r\n", err, header, err, err, info);
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exit(0);
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}
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/***************************************************************************
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decode a base64 string in-place - simple and slow algorithm
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***************************************************************************/
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static void base64_decode(char *s)
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{
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char *b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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int bit_offset, byte_offset, idx, i;
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unsigned char *d = (unsigned char *)s;
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char *p;
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i=0;
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while (*s && (p=strchr(b64,*s))) {
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idx = (int)(p - b64);
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byte_offset = (i*6)/8;
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bit_offset = (i*6)%8;
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d[byte_offset] &= ~((1<<(8-bit_offset))-1);
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if (bit_offset < 3) {
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d[byte_offset] |= (idx << (2-bit_offset));
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} else {
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d[byte_offset] |= (idx >> (bit_offset-2));
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d[byte_offset+1] = 0;
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d[byte_offset+1] |= (idx << (8-(bit_offset-2))) & 0xFF;
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}
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s++; i++;
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}
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}
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|
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|
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/***************************************************************************
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handle a http authentication line
|
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***************************************************************************/
|
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static int cgi_handle_authorization(char *line)
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{
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char *p, *user, *pass;
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struct passwd *pwd;
|
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int ret=0;
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|
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if (strncasecmp(line,"Basic ", 6)) {
|
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cgi_setup_error("401 Bad Authorization", "",
|
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"Only basic authorization is understood");
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}
|
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line += 6;
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while (line[0] == ' ') line++;
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base64_decode(line);
|
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if (!(p=strchr(line,':'))) {
|
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cgi_setup_error("401 Bad Authorization", "",
|
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"username/password must be supplied");
|
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}
|
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*p = 0;
|
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user = line;
|
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pass = p+1;
|
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|
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/* currently only allow connections as root */
|
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if (strcasecmp(user,"root")) {
|
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cgi_setup_error("401 Bad Authorization", "",
|
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"incorrect username/password");
|
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}
|
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|
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pwd = getpwnam(user);
|
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|
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if (!strcmp((char *)crypt(pass, pwd->pw_passwd),pwd->pw_passwd)) {
|
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ret = 1;
|
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}
|
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|
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memset(pass, 0, strlen(pass));
|
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return ret;
|
||||
}
|
||||
|
||||
|
||||
/***************************************************************************
|
||||
handle a file download
|
||||
***************************************************************************/
|
||||
static void cgi_download(char *file)
|
||||
{
|
||||
struct stat st;
|
||||
char buf[1024];
|
||||
int fd, l;
|
||||
char *p;
|
||||
|
||||
if (!file_exist(file, &st)) {
|
||||
cgi_setup_error("404 File Not Found","",
|
||||
"The requested file was not found");
|
||||
}
|
||||
fd = open(file,O_RDONLY);
|
||||
if (fd == -1) {
|
||||
cgi_setup_error("404 File Not Found","",
|
||||
"The requested file was not found");
|
||||
}
|
||||
printf("HTTP/1.1 200 OK\r\n");
|
||||
if ((p=strrchr(file,'.'))) {
|
||||
if (strcmp(p,".gif")==0 || strcmp(p,".jpg")==0) {
|
||||
printf("Content-Type: image/gif\r\n");
|
||||
} else {
|
||||
printf("Content-Type: text/html\r\n");
|
||||
}
|
||||
}
|
||||
printf("Content-Length: %d\r\n\r\n", (int)st.st_size);
|
||||
while ((l=read(fd,buf,sizeof(buf)))>0) {
|
||||
fwrite(buf, 1, l, stdout);
|
||||
}
|
||||
close(fd);
|
||||
exit(0);
|
||||
}
|
||||
|
||||
|
||||
/***************************************************************************
|
||||
setup the cgi framework, handling the possability that this program is either
|
||||
run as a true cgi program by a web browser or is itself a mini web server
|
||||
***************************************************************************/
|
||||
void cgi_setup(char *rootdir)
|
||||
{
|
||||
int authenticated = 0;
|
||||
char line[1024];
|
||||
char *url=NULL;
|
||||
char *p;
|
||||
|
||||
if (chdir(rootdir)) {
|
||||
cgi_setup_error("400 Server Error", "",
|
||||
"chdir failed - the server is not configured correctly");
|
||||
}
|
||||
|
||||
if (getenv("CONTENT_LENGTH") || getenv("REQUEST_METHOD")) {
|
||||
/* assume we are running under a real web server */
|
||||
return;
|
||||
}
|
||||
|
||||
/* we are a mini-web server. We need to read the request from stdin
|
||||
and handle authentication etc */
|
||||
while (fgets(line, sizeof(line)-1, stdin)) {
|
||||
if (line[0] == '\r' || line[0] == '\n') break;
|
||||
if (strncasecmp(line,"GET ", 4)==0) {
|
||||
request_get = 1;
|
||||
url = strdup(&line[4]);
|
||||
} else if (strncasecmp(line,"POST ", 5)==0) {
|
||||
request_post = 1;
|
||||
url = strdup(&line[5]);
|
||||
} else if (strncasecmp(line,"PUT ", 4)==0) {
|
||||
cgi_setup_error("400 Bad Request", "",
|
||||
"This server does not accept PUT requests");
|
||||
} else if (strncasecmp(line,"Authorization: ", 15)==0) {
|
||||
authenticated = cgi_handle_authorization(&line[15]);
|
||||
} else if (strncasecmp(line,"Content-Length: ", 16)==0) {
|
||||
content_length = atoi(&line[16]);
|
||||
}
|
||||
/* ignore all other requests! */
|
||||
}
|
||||
|
||||
if (!authenticated) {
|
||||
cgi_setup_error("401 Authorization Required",
|
||||
"WWW-Authenticate: Basic realm=\"samba\"\r\n",
|
||||
"You must be authenticated to use this service");
|
||||
}
|
||||
|
||||
if (!url) {
|
||||
cgi_setup_error("400 Bad Request", "",
|
||||
"You must specify a GET or POST request");
|
||||
}
|
||||
|
||||
/* trim the URL */
|
||||
if ((p = strchr(url,' ')) || (p=strchr(url,'\t'))) {
|
||||
*p = 0;
|
||||
}
|
||||
while (*url && strchr("\r\n",url[strlen(url)-1])) {
|
||||
url[strlen(url)-1] = 0;
|
||||
}
|
||||
|
||||
/* anything following a ? in the URL is part of the query string */
|
||||
if ((p=strchr(url,'?'))) {
|
||||
query_string = p+1;
|
||||
*p = 0;
|
||||
}
|
||||
|
||||
if (strcmp(url,"/")) {
|
||||
cgi_download(url+1);
|
||||
}
|
||||
|
||||
printf("HTTP/1.1 200 OK\r\nConnection: close\r\nContent-Type: text/html\r\n\r\n");
|
||||
|
||||
}
|
||||
|
||||
@ -1,6 +1,4 @@
|
||||
/*
|
||||
Unix SMB/Netbios implementation.
|
||||
Version 1.9.
|
||||
some simple CGI helper routines
|
||||
Copyright (C) Andrew Tridgell 1997
|
||||
|
||||
@ -20,9 +18,19 @@
|
||||
*/
|
||||
|
||||
|
||||
#include "includes.h"
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <sys/stat.h>
|
||||
#include <string.h>
|
||||
#include <fcntl.h>
|
||||
#include <unistd.h>
|
||||
#include <pwd.h>
|
||||
|
||||
#define MAX_VARIABLES 512
|
||||
#define MAX_VARIABLES 10000
|
||||
|
||||
#ifdef DEBUG_COMMENTS
|
||||
extern void print_title(char *fmt, ...);
|
||||
#endif
|
||||
|
||||
struct var {
|
||||
char *name;
|
||||
@ -31,14 +39,60 @@ struct var {
|
||||
|
||||
static struct var variables[MAX_VARIABLES];
|
||||
static int num_variables;
|
||||
static int content_length;
|
||||
static int request_post;
|
||||
static int request_get;
|
||||
static char *query_string;
|
||||
|
||||
|
||||
static int grab_line(int *cl, char *line, int maxsize)
|
||||
static void unescape(char *buf)
|
||||
{
|
||||
char *p=buf;
|
||||
|
||||
while ((p=strchr(p,'+')))
|
||||
*p = ' ';
|
||||
|
||||
p = buf;
|
||||
|
||||
while (p && *p && (p=strchr(p,'%'))) {
|
||||
int c1 = p[1];
|
||||
int c2 = p[2];
|
||||
|
||||
if (c1 >= '0' && c1 <= '9')
|
||||
c1 = c1 - '0';
|
||||
else if (c1 >= 'A' && c1 <= 'F')
|
||||
c1 = 10 + c1 - 'A';
|
||||
else if (c1 >= 'a' && c1 <= 'f')
|
||||
c1 = 10 + c1 - 'a';
|
||||
else {p++; continue;}
|
||||
|
||||
if (c2 >= '0' && c2 <= '9')
|
||||
c2 = c2 - '0';
|
||||
else if (c2 >= 'A' && c2 <= 'F')
|
||||
c2 = 10 + c2 - 'A';
|
||||
else if (c2 >= 'a' && c2 <= 'f')
|
||||
c2 = 10 + c2 - 'a';
|
||||
else {p++; continue;}
|
||||
|
||||
*p = (c1<<4) | c2;
|
||||
|
||||
memcpy(p+1, p+3, strlen(p+3)+1);
|
||||
p++;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static char *grab_line(FILE *f, int *cl)
|
||||
{
|
||||
char *ret;
|
||||
int i = 0;
|
||||
int len = 1024;
|
||||
|
||||
ret = (char *)malloc(len);
|
||||
if (!ret) return NULL;
|
||||
|
||||
|
||||
while ((*cl)) {
|
||||
int c = fgetc(stdin);
|
||||
int c = fgetc(f);
|
||||
(*cl)--;
|
||||
|
||||
if (c == EOF) {
|
||||
@ -46,98 +100,140 @@ static int grab_line(int *cl, char *line, int maxsize)
|
||||
break;
|
||||
}
|
||||
|
||||
if (c == '+') {
|
||||
c = ' ';
|
||||
}
|
||||
|
||||
if (c == '\r') continue;
|
||||
|
||||
if (strchr("\n&", c)) break;
|
||||
|
||||
if (c == '%' && (*cl) >= 2) {
|
||||
int c1, c2;
|
||||
c1 = fgetc(stdin);
|
||||
c2 = fgetc(stdin);
|
||||
(*cl) -= 2;
|
||||
if (c1 == EOF || c2 == EOF) break;
|
||||
if (c1 >= '0' && c1 <= '9')
|
||||
c1 = c1 - '0';
|
||||
else if (c1 >= 'A' && c1 <= 'F')
|
||||
c1 = 10 + c1 - 'A';
|
||||
else if (c1 >= 'a' && c1 <= 'f')
|
||||
c1 = 10 + c1 - 'a';
|
||||
else break;
|
||||
ret[i++] = c;
|
||||
|
||||
if (c2 >= '0' && c2 <= '9')
|
||||
c2 = c2 - '0';
|
||||
else if (c2 >= 'A' && c2 <= 'F')
|
||||
c2 = 10 + c2 - 'A';
|
||||
else if (c2 >= 'a' && c2 <= 'f')
|
||||
c2 = 10 + c2 - 'a';
|
||||
else break;
|
||||
|
||||
c = (c1<<4) | c2;
|
||||
if (i == len-1) {
|
||||
char *ret2;
|
||||
ret2 = (char *)realloc(ret, len*2);
|
||||
if (!ret2) return ret;
|
||||
len *= 2;
|
||||
ret = ret2;
|
||||
}
|
||||
|
||||
line[i++] = c;
|
||||
|
||||
if (i == maxsize) break;
|
||||
}
|
||||
|
||||
/* now unescape the line */
|
||||
|
||||
|
||||
line[i] = 0;
|
||||
return 1;
|
||||
ret[i] = 0;
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
/***************************************************************************
|
||||
load all the variables passed to the CGI program
|
||||
load all the variables passed to the CGI program. May have multiple variables
|
||||
with the same name and the same or different values. Takes a file parameter
|
||||
for simulating CGI invocation eg loading saved preferences.
|
||||
***************************************************************************/
|
||||
void cgi_load_variables(void)
|
||||
void cgi_load_variables(FILE *f1)
|
||||
{
|
||||
static pstring line;
|
||||
char *p;
|
||||
FILE *f = f1;
|
||||
static char *line;
|
||||
char *p, *s, *tok;
|
||||
int len;
|
||||
|
||||
if (!(p=getenv("CONTENT_LENGTH"))) return;
|
||||
|
||||
len = atoi(p);
|
||||
|
||||
if (len <= 0) return;
|
||||
|
||||
|
||||
|
||||
while (len && grab_line(&len, line, sizeof(line)-1)) {
|
||||
p = strchr(line,'=');
|
||||
if (!p) continue;
|
||||
|
||||
*p = 0;
|
||||
|
||||
variables[num_variables].name = strdup(line);
|
||||
variables[num_variables].value = strdup(p+1);
|
||||
|
||||
if (!variables[num_variables].name ||
|
||||
!variables[num_variables].value)
|
||||
continue;
|
||||
|
||||
#if 0
|
||||
printf("%s=%s<br>\n",
|
||||
variables[num_variables].name,
|
||||
variables[num_variables].value);
|
||||
#ifdef DEBUG_COMMENTS
|
||||
char dummy[100]="";
|
||||
print_title(dummy);
|
||||
printf("<!== Start dump in cgi_load_variables() %s ==>\n",__FILE__);
|
||||
#endif
|
||||
|
||||
num_variables++;
|
||||
if (num_variables == MAX_VARIABLES) break;
|
||||
if (!f1) {
|
||||
f = stdin;
|
||||
if (!content_length) {
|
||||
p = getenv("CONTENT_LENGTH");
|
||||
len = p?atoi(p):0;
|
||||
} else {
|
||||
len = content_length;
|
||||
}
|
||||
} else {
|
||||
fseek(f, 0, SEEK_END);
|
||||
len = ftell(f);
|
||||
fseek(f, 0, SEEK_SET);
|
||||
}
|
||||
|
||||
|
||||
if (len > 0 &&
|
||||
(f1 || request_post ||
|
||||
((s=getenv("REQUEST_METHOD")) &&
|
||||
strcasecmp(s,"POST")==0))) {
|
||||
while (len && (line=grab_line(f, &len))) {
|
||||
p = strchr(line,'=');
|
||||
if (!p) continue;
|
||||
|
||||
*p = 0;
|
||||
|
||||
variables[num_variables].name = strdup(line);
|
||||
variables[num_variables].value = strdup(p+1);
|
||||
|
||||
free(line);
|
||||
|
||||
if (!variables[num_variables].name ||
|
||||
!variables[num_variables].value)
|
||||
continue;
|
||||
|
||||
unescape(variables[num_variables].value);
|
||||
unescape(variables[num_variables].name);
|
||||
|
||||
#ifdef DEBUG_COMMENTS
|
||||
printf("<!== POST var %s has value \"%s\" ==>\n",
|
||||
variables[num_variables].name,
|
||||
variables[num_variables].value);
|
||||
#endif
|
||||
|
||||
num_variables++;
|
||||
if (num_variables == MAX_VARIABLES) break;
|
||||
}
|
||||
}
|
||||
|
||||
if (f1) {
|
||||
#ifdef DEBUG_COMMENTS
|
||||
printf("<!== End dump in cgi_load_variables() ==>\n");
|
||||
#endif
|
||||
return;
|
||||
}
|
||||
|
||||
fclose(stdin);
|
||||
|
||||
if ((s=query_string) || (s=getenv("QUERY_STRING"))) {
|
||||
for (tok=strtok(s,"&;");tok;tok=strtok(NULL,"&;")) {
|
||||
p = strchr(tok,'=');
|
||||
if (!p) continue;
|
||||
|
||||
*p = 0;
|
||||
|
||||
variables[num_variables].name = strdup(tok);
|
||||
variables[num_variables].value = strdup(p+1);
|
||||
|
||||
if (!variables[num_variables].name ||
|
||||
!variables[num_variables].value)
|
||||
continue;
|
||||
|
||||
unescape(variables[num_variables].value);
|
||||
unescape(variables[num_variables].name);
|
||||
|
||||
#ifdef DEBUG_COMMENTS
|
||||
printf("<!== Commandline var %s has value \"%s\" ==>\n",
|
||||
variables[num_variables].name,
|
||||
variables[num_variables].value);
|
||||
#endif
|
||||
num_variables++;
|
||||
if (num_variables == MAX_VARIABLES) break;
|
||||
}
|
||||
|
||||
}
|
||||
#ifdef DEBUG_COMMENTS
|
||||
printf("<!== End dump in cgi_load_variables() ==>\n");
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
/***************************************************************************
|
||||
find a variable passed via CGI
|
||||
Doesn't quite do what you think in the case of POST text variables, because
|
||||
if they exist they might have a value of "" or even " ", depending on the
|
||||
browser. Also doesn't allow for variables[] containing multiple variables
|
||||
with the same name and the same or different values.
|
||||
***************************************************************************/
|
||||
char *cgi_variable(char *name)
|
||||
{
|
||||
@ -149,6 +245,15 @@ char *cgi_variable(char *name)
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/***************************************************************************
|
||||
return a particular cgi variable
|
||||
***************************************************************************/
|
||||
char *cgi_vnum(int i, char **name)
|
||||
{
|
||||
if (i < 0 || i >= num_variables) return NULL;
|
||||
*name = variables[i].name;
|
||||
return variables[i].value;
|
||||
}
|
||||
|
||||
/***************************************************************************
|
||||
return the value of a CGI boolean variable.
|
||||
@ -161,3 +266,341 @@ int cgi_boolean(char *name, int def)
|
||||
|
||||
return strcmp(p, "1") == 0;
|
||||
}
|
||||
|
||||
/***************************************************************************
|
||||
like strdup() but quotes < > and &
|
||||
***************************************************************************/
|
||||
char *quotedup(char *s)
|
||||
{
|
||||
int i, n=0;
|
||||
int len;
|
||||
char *ret;
|
||||
char *d;
|
||||
|
||||
if (!s) return strdup("");
|
||||
|
||||
len = strlen(s);
|
||||
|
||||
for (i=0;i<len;i++)
|
||||
if (s[i] == '<' || s[i] == '>' || s[i] == '&')
|
||||
n++;
|
||||
|
||||
ret = malloc(len + n*6 + 1);
|
||||
|
||||
if (!ret) return NULL;
|
||||
|
||||
d = ret;
|
||||
|
||||
for (i=0;i<len;i++) {
|
||||
switch (s[i]) {
|
||||
case '<':
|
||||
strcpy(d, "<");
|
||||
d += 4;
|
||||
break;
|
||||
|
||||
case '>':
|
||||
strcpy(d, ">");
|
||||
d += 4;
|
||||
break;
|
||||
|
||||
case '&':
|
||||
strcpy(d, "&");
|
||||
d += 5;
|
||||
break;
|
||||
|
||||
default:
|
||||
*d++ = s[i];
|
||||
}
|
||||
}
|
||||
|
||||
*d = 0;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
/***************************************************************************
|
||||
like strdup() but quotes a wide range of characters
|
||||
***************************************************************************/
|
||||
char *urlquote(char *s)
|
||||
{
|
||||
int i, n=0;
|
||||
int len;
|
||||
char *ret;
|
||||
char *d;
|
||||
char *qlist = "\"\n\r'&<> \t+;";
|
||||
|
||||
if (!s) return strdup("");
|
||||
|
||||
len = strlen(s);
|
||||
|
||||
for (i=0;i<len;i++)
|
||||
if (strchr(qlist, s[i])) n++;
|
||||
|
||||
ret = malloc(len + n*2 + 1);
|
||||
|
||||
if (!ret) return NULL;
|
||||
|
||||
d = ret;
|
||||
|
||||
for (i=0;i<len;i++) {
|
||||
if (strchr(qlist,s[i])) {
|
||||
sprintf(d, "%%%02X", (int)s[i]);
|
||||
d += 3;
|
||||
} else {
|
||||
*d++ = s[i];
|
||||
}
|
||||
}
|
||||
|
||||
*d = 0;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
/***************************************************************************
|
||||
like strdup() but quotes " characters
|
||||
***************************************************************************/
|
||||
char *quotequotes(char *s)
|
||||
{
|
||||
int i, n=0;
|
||||
int len;
|
||||
char *ret;
|
||||
char *d;
|
||||
|
||||
if (!s) return strdup("");
|
||||
|
||||
len = strlen(s);
|
||||
|
||||
for (i=0;i<len;i++)
|
||||
if (s[i] == '"')
|
||||
n++;
|
||||
|
||||
ret = malloc(len + n*6 + 1);
|
||||
|
||||
if (!ret) return NULL;
|
||||
|
||||
d = ret;
|
||||
|
||||
for (i=0;i<len;i++) {
|
||||
switch (s[i]) {
|
||||
case '"':
|
||||
strcpy(d, """);
|
||||
d += 6;
|
||||
break;
|
||||
|
||||
default:
|
||||
*d++ = s[i];
|
||||
}
|
||||
}
|
||||
|
||||
*d = 0;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
/***************************************************************************
|
||||
quote spaces in a buffer
|
||||
***************************************************************************/
|
||||
void quote_spaces(char *buf)
|
||||
{
|
||||
while (*buf) {
|
||||
if (*buf == ' ') *buf = '+';
|
||||
buf++;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
/***************************************************************************
|
||||
tell a browser about a fatal error in the http processing
|
||||
***************************************************************************/
|
||||
static void cgi_setup_error(char *err, char *header, char *info)
|
||||
{
|
||||
printf("HTTP/1.1 %s\r\n%sConnection: close\r\nContent-Type: text/html\r\n\r\n<HTML><HEAD><TITLE>%s</TITLE></HEAD><BODY><H1>%s</H1>%s<p></BODY></HTML>\r\n", err, header, err, err, info);
|
||||
exit(0);
|
||||
}
|
||||
|
||||
|
||||
/***************************************************************************
|
||||
decode a base64 string in-place - simple and slow algorithm
|
||||
***************************************************************************/
|
||||
static void base64_decode(char *s)
|
||||
{
|
||||
char *b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
|
||||
int bit_offset, byte_offset, idx, i;
|
||||
unsigned char *d = (unsigned char *)s;
|
||||
char *p;
|
||||
|
||||
i=0;
|
||||
|
||||
while (*s && (p=strchr(b64,*s))) {
|
||||
idx = (int)(p - b64);
|
||||
byte_offset = (i*6)/8;
|
||||
bit_offset = (i*6)%8;
|
||||
d[byte_offset] &= ~((1<<(8-bit_offset))-1);
|
||||
if (bit_offset < 3) {
|
||||
d[byte_offset] |= (idx << (2-bit_offset));
|
||||
} else {
|
||||
d[byte_offset] |= (idx >> (bit_offset-2));
|
||||
d[byte_offset+1] = 0;
|
||||
d[byte_offset+1] |= (idx << (8-(bit_offset-2))) & 0xFF;
|
||||
}
|
||||
s++; i++;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/***************************************************************************
|
||||
handle a http authentication line
|
||||
***************************************************************************/
|
||||
static int cgi_handle_authorization(char *line)
|
||||
{
|
||||
char *p, *user, *pass;
|
||||
struct passwd *pwd;
|
||||
int ret=0;
|
||||
|
||||
if (strncasecmp(line,"Basic ", 6)) {
|
||||
cgi_setup_error("401 Bad Authorization", "",
|
||||
"Only basic authorization is understood");
|
||||
}
|
||||
line += 6;
|
||||
while (line[0] == ' ') line++;
|
||||
base64_decode(line);
|
||||
if (!(p=strchr(line,':'))) {
|
||||
cgi_setup_error("401 Bad Authorization", "",
|
||||
"username/password must be supplied");
|
||||
}
|
||||
*p = 0;
|
||||
user = line;
|
||||
pass = p+1;
|
||||
|
||||
/* currently only allow connections as root */
|
||||
if (strcasecmp(user,"root")) {
|
||||
cgi_setup_error("401 Bad Authorization", "",
|
||||
"incorrect username/password");
|
||||
}
|
||||
|
||||
pwd = getpwnam(user);
|
||||
|
||||
if (!strcmp((char *)crypt(pass, pwd->pw_passwd),pwd->pw_passwd)) {
|
||||
ret = 1;
|
||||
}
|
||||
|
||||
memset(pass, 0, strlen(pass));
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
/***************************************************************************
|
||||
handle a file download
|
||||
***************************************************************************/
|
||||
static void cgi_download(char *file)
|
||||
{
|
||||
struct stat st;
|
||||
char buf[1024];
|
||||
int fd, l;
|
||||
char *p;
|
||||
|
||||
if (!file_exist(file, &st)) {
|
||||
cgi_setup_error("404 File Not Found","",
|
||||
"The requested file was not found");
|
||||
}
|
||||
fd = open(file,O_RDONLY);
|
||||
if (fd == -1) {
|
||||
cgi_setup_error("404 File Not Found","",
|
||||
"The requested file was not found");
|
||||
}
|
||||
printf("HTTP/1.1 200 OK\r\n");
|
||||
if ((p=strrchr(file,'.'))) {
|
||||
if (strcmp(p,".gif")==0 || strcmp(p,".jpg")==0) {
|
||||
printf("Content-Type: image/gif\r\n");
|
||||
} else {
|
||||
printf("Content-Type: text/html\r\n");
|
||||
}
|
||||
}
|
||||
printf("Content-Length: %d\r\n\r\n", (int)st.st_size);
|
||||
while ((l=read(fd,buf,sizeof(buf)))>0) {
|
||||
fwrite(buf, 1, l, stdout);
|
||||
}
|
||||
close(fd);
|
||||
exit(0);
|
||||
}
|
||||
|
||||
|
||||
/***************************************************************************
|
||||
setup the cgi framework, handling the possability that this program is either
|
||||
run as a true cgi program by a web browser or is itself a mini web server
|
||||
***************************************************************************/
|
||||
void cgi_setup(char *rootdir)
|
||||
{
|
||||
int authenticated = 0;
|
||||
char line[1024];
|
||||
char *url=NULL;
|
||||
char *p;
|
||||
|
||||
if (chdir(rootdir)) {
|
||||
cgi_setup_error("400 Server Error", "",
|
||||
"chdir failed - the server is not configured correctly");
|
||||
}
|
||||
|
||||
if (getenv("CONTENT_LENGTH") || getenv("REQUEST_METHOD")) {
|
||||
/* assume we are running under a real web server */
|
||||
return;
|
||||
}
|
||||
|
||||
/* we are a mini-web server. We need to read the request from stdin
|
||||
and handle authentication etc */
|
||||
while (fgets(line, sizeof(line)-1, stdin)) {
|
||||
if (line[0] == '\r' || line[0] == '\n') break;
|
||||
if (strncasecmp(line,"GET ", 4)==0) {
|
||||
request_get = 1;
|
||||
url = strdup(&line[4]);
|
||||
} else if (strncasecmp(line,"POST ", 5)==0) {
|
||||
request_post = 1;
|
||||
url = strdup(&line[5]);
|
||||
} else if (strncasecmp(line,"PUT ", 4)==0) {
|
||||
cgi_setup_error("400 Bad Request", "",
|
||||
"This server does not accept PUT requests");
|
||||
} else if (strncasecmp(line,"Authorization: ", 15)==0) {
|
||||
authenticated = cgi_handle_authorization(&line[15]);
|
||||
} else if (strncasecmp(line,"Content-Length: ", 16)==0) {
|
||||
content_length = atoi(&line[16]);
|
||||
}
|
||||
/* ignore all other requests! */
|
||||
}
|
||||
|
||||
if (!authenticated) {
|
||||
cgi_setup_error("401 Authorization Required",
|
||||
"WWW-Authenticate: Basic realm=\"samba\"\r\n",
|
||||
"You must be authenticated to use this service");
|
||||
}
|
||||
|
||||
if (!url) {
|
||||
cgi_setup_error("400 Bad Request", "",
|
||||
"You must specify a GET or POST request");
|
||||
}
|
||||
|
||||
/* trim the URL */
|
||||
if ((p = strchr(url,' ')) || (p=strchr(url,'\t'))) {
|
||||
*p = 0;
|
||||
}
|
||||
while (*url && strchr("\r\n",url[strlen(url)-1])) {
|
||||
url[strlen(url)-1] = 0;
|
||||
}
|
||||
|
||||
/* anything following a ? in the URL is part of the query string */
|
||||
if ((p=strchr(url,'?'))) {
|
||||
query_string = p+1;
|
||||
*p = 0;
|
||||
}
|
||||
|
||||
if (strcmp(url,"/")) {
|
||||
cgi_download(url+1);
|
||||
}
|
||||
|
||||
printf("HTTP/1.1 200 OK\r\nConnection: close\r\nContent-Type: text/html\r\n\r\n");
|
||||
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user