httpjson.c
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/////////////////////////////////////////////////////////////////////////////
//
// httpjson.c
//
// JSON parser
//
/////////////////////////////////////////////////////////////////////////////
#ifndef WINCE
#include <fcntl.h>
#include <errno.h>
#include <sys/stat.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "httpd.h"
#include "httpint.h"
void _mwFreeJSONPairs(UrlHandlerParam* up)
{
if (up->json) {
int i;
for (i = 0; i < up->jsonPairCount; i++) {
free(up->json[i].name);
free(up->json[i].value);
}
free(up->json);
up->json = 0;
up->jsonPairCount = 0;
}
}
NameValuePair* mwGetJSONData(UrlHandlerParam* up, const char* name)
{
int i;
for (i = 0; i < up->jsonPairCount; i++) {
if (!strcmp(up->json[i].name, name)) {
return up->json + i;
}
}
return 0;
}
int mwParseJSONString(UrlHandlerParam* up)
{
char *p = up->pucPayload;
if (!p) return 0;
NameValuePair pair;
char keybase[256] = { 0 };
int curLevel = 0;
_mwFreeJSONPairs(up);
while (*p) {
switch (*p) {
case '{':
curLevel++;
p++;
break;
case '}':
curLevel--;
if (*keybase) {
char *q;
for (q = keybase + strlen(keybase) - 2; q >= keybase && *q != '.'; q--);
*(q + 1) = 0;
}
p++;
break;
case '\"':
{
char *q;
;
if (!(q = strchr(p + 1, '\"'))) continue;
pair.name = p + 1;
if (!(p = strchr(q + 1, ':'))) continue;
while (*(++p) == ' ' || *p == '\r' || *p == '\n');
int i = up->jsonPairCount;
if (*p == '\"') {
pair.type = JSON_TYPE_STRING;
pair.value = ++p;
if (!(p = strchr(p, '\"'))) continue;
*q = 0;
*p = 0;
up->jsonPairCount++;
up->json = realloc(up->json, sizeof(NameValuePair) * up->jsonPairCount);
up->json[i].name = malloc(strlen(keybase) + strlen(pair.name) + 1);
strcpy(up->json[i].name, keybase);
strcat(up->json[i].name, pair.name);
up->json[i].value = strdup(pair.value);
up->json[i].type = JSON_TYPE_STRING;
*q = '\"';
*p = '\"';
p++;
}
else if (*p == '{') {
// object
*q = 0;
if (strlen(keybase) + strlen(pair.name) + 1 < sizeof(keybase)) {
strcat(keybase, pair.name);
strcat(keybase, ".");
}
*q = '\"';
}
else if (*p == '[') {
// array
p++;
}
else {
pair.value = p;
if (!strncmp(p, "true", 4)) {
p += 4;
if (isalpha((int)*p) || isdigit((int)*p)) continue;
pair.type = JSON_TYPE_BOOLEAN;
}
else if (!strncmp(p, "false", 5)) {
p += 5;
if (isalpha((int)*p) || isdigit((int)*p)) continue;
pair.type = JSON_TYPE_BOOLEAN;
}
else {
pair.type = JSON_TYPE_DECIMAL;
while (*(++p) == '.' || *p == '-' || isdigit((int)*p));
}
char c = *p;
*q = 0;
*p = 0;
up->jsonPairCount++;
up->json = realloc(up->json, sizeof(NameValuePair) * up->jsonPairCount);
up->json[i].name = malloc(strlen(keybase) + strlen(pair.name) + 1);
strcpy(up->json[i].name, keybase);
strcat(up->json[i].name, pair.name);
up->json[i].value = strdup(pair.value);
up->json[i].type = JSON_TYPE_DECIMAL;
*q = '\"';
*p = c;
}
}
break;
default:
p++;
break;
}
}
return up->jsonPairCount;
}