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#include "parse.h"
#include "cookie.h"
#include "cookies.h"
#include "error.h"
#include "file.h"
#include "multipart.h"
#include "param.h"
#include "request.h"
#include "response.h"
#include "tools.h"
#include "urlencoded.h"
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
extern char **const environ;
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* CGI Request
*/
static char *plain_env(char *env_name)
{
const char *env = getenv(env_name);
if (!env) {
return 0;
}
return magi_str_create_copy(env, strlen(env));
}
static char *lower_env(char *env_name)
{
char *env = plain_env(env_name);
magi_str_lowercase(env);
return env;
}
static void cgi_http_env(struct magi_request *r)
{
char **env;
int len = 0;
r->meta = 0;
for (env = environ; *env; ++env) {
struct magi_param meta;
char *name_end = strchr(*env, '=');
int nlen = name_end - *env;
int dlen = strlen(name_end + 1);
len += nlen + dlen;
if (len > r->limits.params_meta && r->limits.params_meta) {
r->error = magi_error_limit;
return;
}
meta.name = magi_str_create_copy(*env, nlen);
meta.data = magi_str_create_copy(name_end + 1, dlen);
magi_params_add(&r->meta, &meta);
}
}
static void cgi_env(struct magi_request *r)
{
cgi_http_env(r);
r->method = plain_env("REQUEST_METHOD");
r->document_root = plain_env("DOCUMENT_ROOT");
r->script = plain_env("SCRIPT_NAME");
r->host = lower_env("HTTP_HOST");
if (!r->host) {
r->host = lower_env("SERVER_NAME");
}
if (getenv("SERVER_PORT")) {
r->port = atoi(getenv("SERVER_PORT"));
r->is_secure = r->port == 443;
} else {
r->port = 0;
r->is_secure = 0;
}
r->path = plain_env("PATH_INFO");
}
static void cgi_cookies(struct magi_request *r)
{
const char *env = getenv("HTTP_COOKIE");
if (!env || !*env) {
r->cookies = 0;
return;
}
if ((int)strlen(env) > r->limits.cookies && r->limits.cookies) {
r->error = magi_error_limit;
return;
}
magi_parse_cookies(r, env);
}
static void cgi_input_get(enum magi_error *e, char **input, int max)
{
const char *env_input = getenv("QUERY_STRING");
if (env_input) {
int len = strlen(env_input);
if (len >= max && max) {
*e = magi_error_limit;
return;
}
*input = magi_str_create_copy(env_input, len);
}
}
static void cgi_url(struct magi_request *request)
{
char *in = 0;
cgi_input_get(&request->error, &in, request->limits.params_head);
if (!request->error) {
magi_parse_urlencoded(&request->head, in);
free(in);
}
}
static void cgi_input_post(enum magi_error *e, char **input, int max)
{
int input_len = strtoul(getenv("CONTENT_LENGTH"), 0, 10);
if (!input_len) {
*e = magi_error_length;
return;
}
if (input_len > max && max) {
*e = magi_error_limit;
return;
}
*input = magi_str_create(input_len);
if ((int)fread(*input, 1, input_len, stdin) != input_len) {
*e = magi_error_length;
return;
}
}
static char *bound(const char *type)
{
type = strchr(type, '=');
if (!type) {
return 0;
}
type += strspn(type, " \t") + 1;
if (*type == '"') {
++type;
return magi_str_create_copy(type, type - strchr(type, '"'));
}
return magi_str_create_copy(type, strcspn(type, " \t"));
}
static int next(void *userdata)
{
int size = *(int *)userdata;
static char *buffer = 0;
static int left = 0;
static int last = 0;
static int pos;
if (!buffer) {
if (last) {
return EOF;
}
buffer = malloc(size);
}
if (!left) {
if (last) {
free(buffer);
buffer = 0;
return EOF;
}
left = fread(buffer, 1, size, stdin);
last = left != size;
pos = 0;
}
left--;
return buffer[pos++];
}
/* Interfacial CGI Request Handling */
int magi_parse_head(struct magi_request *request)
{
request->cookies = 0;
request->files = 0;
request->meta = 0;
request->head = 0;
request->body = 0;
request->error = 0;
cgi_env(request);
cgi_cookies(request);
cgi_url(request);
return !request->error;
}
int magi_parse_body(struct magi_request *request)
{
enum magi_error *e = &request->error;
request->error = magi_error_none;
if (request->method && !strcmp(request->method, "POST")) {
const char *t = getenv("CONTENT_TYPE");
if (!t) {
*e = magi_error_notype;
return 0;
}
if (!strncmp(t, "multipart/form-data", 19)) {
char *boundary = bound(t);
if (boundary && *boundary) {
magi_parse_multipart(request, boundary, next,
&request->limits.read_buffer);
} else {
*e = magi_error_nobound;
}
free(boundary);
} else if (!strcmp(t, "application/x-www-form-urlencoded")) {
char *in = 0;
cgi_input_post(e, &in, request->limits.params_body);
if (!*e) {
magi_parse_urlencoded(&request->body, in);
}
free(in);
} else {
*e = magi_error_unknown;
return 0;
}
}
return !request->error;
}
int magi_parse(struct magi_request *request)
{
return magi_parse_head(request) && magi_parse_body(request);
}
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