http.c

@@ -7,24 +7,35 @@
 int curl_setup = 0;
 char* request(char *url )
 {
-	if(!curl_setup)
+	// initialize curl on the first call of this function
+	if(curl_setup == 0)
 	{
 		curl_global_init(CURL_GLOBAL_DEFAULT);
-		url +=1;
+		curl_setup=1;
 	}
 	
 	struct httpResponse_t httpResponse;
 	httpResponse.response = malloc(1);
 	httpResponse.size = 0;
 	CURL *httpHandler = curl_easy_init();
+	CURLcode return_code;
 	if(httpHandler) {
 		curl_easy_setopt(httpHandler,CURLOPT_URL, url);
 		curl_easy_setopt(httpHandler,CURLOPT_WRITEFUNCTION, httpResponseCallback);
 		curl_easy_setopt(httpHandler,CURLOPT_WRITEDATA, (void *)&httpResponse);
-		curl_easy_perform(httpHandler);
+		return_code = curl_easy_perform(httpHandler);
 	}
 	else
-		return "Lol, fehler";
+	{
+		fprintf(stderr, "CURL Error");
+		return NULL;
+	}
+	printf("%i\n",httpResponse.size);
+	if(return_code != CURLE_OK)
+	{
+		fprintf(stderr, "HTTP Error: %s",curl_easy_strerror(return_code));
+		return NULL;
+	}
 	return httpResponse.response;
 }
 size_t httpResponseCallback(char *data, size_t wordlength, size_t bytecount, void *out)

lichess.c

@@ -2,17 +2,20 @@
 
 #include <string.h>
 #include <json-c/json_tokener.h>
+#include <stdio.h>
 
 json_object* query_lichess(char* username)
 {
 	/* This function queries the lichess api and returns a pointer to a
 	 * json_object, that contains the profile of the queried player
 	 */
-	 char* api_base = "https://lichess.org/api/user/";
-	 char user_url[128];
-	 strcpy(user_url,api_base);
-	 char* http_response = request(strcat(
-		user_url,username));
+	char* api_base = "https://lichess.org/api/user/";
+	char user_url[128];
+	strcpy(user_url,api_base);
+	strcat(user_url,username);
+	printf("%s",user_url);
+	char* http_response = request(user_url);
+	printf("\n%p\n",http_response);
 	json_object *lichessUser = json_tokener_parse(http_response);
 	json_object *profile = json_object_object_get(lichessUser,"profile");
 	return profile;

main.c

@@ -32,8 +32,33 @@
 int main(int argc, char **argv)
 {
 	// json_object *profile = malloc(1);
-	json_object *profile = query_lichess("alireza2003");
-	printf("%s\n",json_object_get_string(profile));
-
+	FILE *output = fopen("output.csv","w");
+	FILE *playersfile = fopen("players.csv","r");
+	if(playersfile == NULL)
+	{
+		fputs("Couldn't open players.csv\n",stdout);
+		return 1;
+	}
+	fputs("lichess_id,name\n",output);
+	char line [128];
+	while(fgets(line, sizeof line, playersfile) != NULL)
+	{
+		char outline[256];
+		char name[128];
+		json_object *profile = query_lichess(line);
+		char *firstName = json_object_get_string(json_object_object_get(profile,"firstName"));
+		char *lastName = json_object_get_string(json_object_object_get(profile,"lastName"));
+		if(firstName == NULL || lastName == NULL)
+		{
+			printf("No name for %s",line);
+			printf("object is: %s",json_object_get_string(profile));
+			continue;
+		}
+		strcpy(name,firstName);
+		strcat(name," ");
+		strcat(name,lastName);
+		sprintf(outline, "%s,%s\n",line,name);
+		fputs(outline,output);
+	}
 	return 0;
 }