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#include "cgi.h"
#include "cookie.h"
#include "error.h"
#include "field.h"
#include "multipart.h"
#include "param.h"
#include "request.h"
#include "urlencoded.h"
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
extern char ** environ;
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* CGI Request Handling
*/
/* Helpers for CGI Request Handling */
static int plain_env(char ** dest, char * env_name)
{
int ok = 1;
const char * env = getenv(env_name);
if (env) {
*dest = str_alloc(strlen(env));
if (*dest) {
strcpy(*dest, env);
} else {
ok = 0;
}
} else {
*dest = 0;
}
return ok;
}
static int lower_env(char ** dest, char * env_name)
{
int ok = plain_env(dest, env_name);
lowercase(*dest);
return ok;
}
static int cgi_http_env(struct magi_request * r)
{
int ok = 1;
char ** env = environ;
r->http_params = 0;
while (*env) {
if (!strncmp(*env, "HTTP_", 5) && strncmp(*env, "HTTP_COOKIE=", 12)) {
struct magi_param param;
/* At least one '=' must be in *env, according to format. */
char * name_end = strchr(*env, '=');
param.name = str_alloc(name_end - *env - 5);
if (param.name) {
memcpy(param.name, *env + 5, name_end - *env - 5);
param.data = str_alloc(strlen(name_end + 1));
if (param.data) {
strcpy(param.data, name_end + 1);
} else {
free(param.name);
}
}
if (param.name && param.data) {
ok = magi_param_list_add(&r->http_params, ¶m);
} else {
ok = 0;
}
}
++env;
}
return ok;
}
static void cgi_env(enum magi_error * e, struct magi_request * r)
{
cgi_http_env(e, r);
lower_env(e, &r->method, "REQUEST_METHOD");
plain_env(e, &r->uri, "REQUEST_URI");
plain_env(e, &r->document_root, "DOCUMENT_ROOT");
plain_env(e, &r->document_uri, "DOCUMENT_URI");
plain_env(e, &r->script_name, "SCRIPT_NAME");
plain_env(e, &r->script_filename, "SCRIPT_FILENAME");
plain_env(e, &r->remote_addr, "REMOTE_ADDR");
plain_env(e, &r->remote_port, "REMOTE_PORT");
plain_env(e, &r->server_addr, "SERVER_ADDR");
lower_env(e, &r->server_name, "SERVER_NAME");
plain_env(e, &r->server_port, "SERVER_PORT");
lower_env(e, &r->server_protocol, "SERVER_PROTOCOL");
plain_env(e, &r->server_software, "SERVER_SOFTWARE");
plain_env(e, &r->path_info, "PATH_INFO");
}
static void cgi_cookies(enum magi_error * e, struct magi_cookie_list ** list)
{
if (!*e) {
const char * env = getenv("HTTP_COOKIE");
*list = 0;
if (env && *env) {
magi_parse_cookie(e, list, env);
} else {
*list = 0;
}
}
}
static int cgi_input_get(char ** input)
{
int ok = 1;
const char * env_input = getenv("QUERY_STRING");
if (env_input) {
*input = str_alloc(strlen(env_input));
if (*input) {
strcpy(*input, env_input);
} else {
ok = 0;
}
}
return ok;
}
static void cgi_input_post(enum magi_error * e, char ** input, int max)
{
if (!*e) {
int input_len = strtoul(getenv("CONTENT_LENGTH"), 0, 10);
if (input_len && (input_len < max || !max)) {
*input = str_alloc(input_len);
if (*input) {
if (fread(*input, 1, input_len, stdin) != input_len) {
*e = magi_error_length;
}
} else {
*e = magi_error_input;
}
}
}
}
static char * bound(const char * type)
{
char * res = 0;
type = strchr(type, '=');
if (type) {
type += strspn(type, " \t") + 1;
if (*type == '"') {
++type;
res = create_str(type, strchr(type, '"'));
} else {
res = create_str(type, type + strcspn(type, " \t"));
}
}
return res;
}
static int intput_getter(void * any)
{
return getchar();
}
/* Interfacial CGI Request Handling */
int magi_cgi_request(struct magi_request * request,
void (*callback)(struct magi_field * field,
char * buffer,
int len),
int max_post)
{
request->fields = 0;
request->error = magi_error_none;
enum magi_error * e = &request->error;
cgi_env(e, request);
cgi_cookies(e, &request->cookies);
if (request->method) {
if (!strcmp(request->method, "post")) {
const char * t = getenv("CONTENT_TYPE");
if (t) {
if (!strncmp(t, "multipart/form-data", 19)) {
char * boundary = bound(t);
if (boundary && *boundary) {
magi_parse_multipart(e, &request->fields,
intput_getter, 0, boundary,
callback);
} else {
*e = magi_error_nobound;
}
free(boundary);
} else if (!strcmp(t, "application/x-www-form-urlencoded")) {
char * in = 0;
cgi_input_post(e, &in, max_post);
magi_parse_urlencoded(e, &request->fields, in);
free(in);
} else {
*e = magi_error_unknown;
}
} else {
*e = magi_error_notype;
}
} else if (!strcmp(request->method, "get")) {
char * in = 0;
cgi_input_get(e, &in);
magi_parse_urlencoded(e, &request->fields, in);
free(in);
}
}
return request->error == magi_error_none;
}
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