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return a response object from libcurl_fetch

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ading2210 2024-01-05 02:27:18 -05:00
parent 741df8fdcf
commit 6cb70c6760
4 changed files with 138 additions and 20 deletions
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52
client/main.c
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@ -5,10 +5,13 @@
#include "curl/curl.h"
#include "cjson/cJSON.h"
#include "errors.h"
#include "curl/easy.h"
#include "curl/header.h"
typedef void(*DataCallback)(char* chunk_ptr, int chunk_size);
typedef void(*EndCallback)(int error);
typedef void(*EndCallback)(int error, char* response_json);
#define ERROR_REDIRECT_DISALLOWED -1
int write_function(void *data, size_t size, size_t nmemb, DataCallback data_callback) {
long real_size = size * nmemb;
@ -40,12 +43,15 @@ void perform_request(const char* url, const char* json_params, DataCallback data
curl_easy_setopt(http_handle, CURLOPT_WRITEFUNCTION, &write_function);
curl_easy_setopt(http_handle, CURLOPT_WRITEDATA, data_callback);
//some default options
curl_easy_setopt(http_handle, CURLOPT_FOLLOWLOCATION, 1);
//parse json options
cJSON* json = cJSON_Parse(json_params);
cJSON* request_json = cJSON_Parse(json_params);
cJSON* item = NULL;
struct curl_slist* headers_list = NULL;
cJSON_ArrayForEach(item, json) {
cJSON_ArrayForEach(item, request_json) {
char* key = item->string;
if (strcmp(key, "_libcurl_verbose") == 0) {
@ -81,13 +87,9 @@ void perform_request(const char* url, const char* json_params, DataCallback data
else if (strcmp(item->valuestring, "manual") == 0) {
curl_easy_setopt(http_handle, CURLOPT_FOLLOWLOCATION, 0);
}
else {
//follow by default
curl_easy_setopt(http_handle, CURLOPT_FOLLOWLOCATION, 1);
}
}
}
cJSON_Delete(json);
cJSON_Delete(request_json);
//add post data if specified
if (body != NULL) {
@ -122,14 +124,44 @@ void perform_request(const char* url, const char* json_params, DataCallback data
if (abort_on_redirect && response_code / 100 == 3) {
error = ERROR_REDIRECT_DISALLOWED;
}
//create new json object with response info
cJSON* response_json = cJSON_CreateObject();
cJSON* status_item = cJSON_CreateNumber(response_code);
cJSON_AddItemToObject(response_json, "status", status_item);
char* response_url;
curl_easy_getinfo(http_handle, CURLINFO_EFFECTIVE_URL, &response_url);
cJSON* url_item = cJSON_CreateString(response_url);
cJSON_AddItemToObject(response_json, "url", url_item);
cJSON* headers_item = cJSON_CreateObject();
struct curl_header *prev_header = NULL;
struct curl_header *header = NULL;
while ((header = curl_easy_nextheader(http_handle, CURLH_HEADER, -1, prev_header))) {
cJSON* header_entry = cJSON_CreateString(header->value);
cJSON_AddItemToObject(headers_item, header->name, header_entry);
prev_header = header;
}
cJSON_AddItemToObject(response_json, "headers", headers_item);
long redirect_count;
curl_easy_getinfo(http_handle, CURLINFO_REDIRECT_COUNT, &redirect_count);
cJSON* redirects_item = cJSON_CreateBool(redirect_count > 0);
cJSON_AddItemToObject(response_json, "redirected", redirects_item);
char* response_json_str = cJSON_Print(response_json);
cJSON_Delete(response_json);
//clean up curl
curl_slist_free_all(headers_list);
curl_multi_remove_handle(multi_handle, http_handle);
curl_easy_cleanup(http_handle);
curl_multi_cleanup(multi_handle);
curl_global_cleanup();
(*end_callback)(error);
(*end_callback)(error, response_json_str);
}
char* copy_bytes(const char* ptr, const int size) {