Initial commit

.gitignore

@@ -0,0 +1,2 @@
+cWikiBot
+output.csv

Dockerfile

@@ -0,0 +1,12 @@
+FROM debian:stable
+MAINTAINER Linuro <cpp@zom.bi>
+
+RUN apt-get update && apt-get install build-essential gcc libjson-c-dev libcurl4-openssl-dev
+
+ADD . /code
+
+WORKDIR /code
+
+RUN ./build.sh
+
+CMD [cWikiBot]

build.sh

@@ -0,0 +1 @@
+gcc -o ./cWikiBot main.c lichess.c http.c -lcurl -ljson-c

clean.sh

@@ -0,0 +1 @@
+rm -r cWikiBot *.out

docker-compose.yml

@@ -0,0 +1,5 @@
+version: ' 2.4'
+
+services:
+  cWikiBot:
+    build: .

http.c

@@ -0,0 +1,56 @@
+#include "http.h"
+
+#include <string.h>
+#include <curl/curl.h>
+#include <stdlib.h>
+
+int curl_setup = 0;
+char* request(char *url)
+{
+	// initialize curl on the first call of this function
+	if(curl_setup == 0)
+	{
+		curl_global_init(CURL_GLOBAL_DEFAULT);
+		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);
+		return_code = curl_easy_perform(httpHandler);
+	}
+	else
+	{
+		fprintf(stderr, "CURL Error");
+		return NULL;
+	}
+	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)
+{
+	// wordlength should be always 1, but this appears to be more secure.
+	size_t size = wordlength * bytecount;
+	struct httpResponse_t *mem = (struct httpResponse_t *) out;
+	
+	char *newData = realloc(mem->response, mem->size + size +1);
+	if(newData == NULL)
+		return 0;
+	mem->response = newData;
+	memcpy(&(mem->response[mem->size]), data, size);
+	mem->size += size;
+	// Null-terminate the byte chunk, to effectively have a C-String.
+	mem->response[mem-> size] = 0;
+	
+	return size;
+}

http.h

@@ -0,0 +1,15 @@
+#ifndef WIKIBOT_HTTP_H
+#define WIKIBOT_HTTP_H
+
+#include <stddef.h>
+
+struct httpResponse_t {
+	char *response;
+	size_t size;
+};
+
+size_t httpResponseCallback(char *data, size_t wordlength, size_t bytecount, void *out);
+
+char* request(char *url );
+
+#endif //WIKIBOT_HTTP_H

lichess.c

@@ -0,0 +1,28 @@
+#include "lichess.h"
+
+#include <string.h>
+#include <json-c/json_tokener.h>
+#include <stdio.h>
+#include <unistd.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);
+	strcat(user_url,username);
+	printf("querying %s\n",user_url);
+	char* http_response = request(user_url);
+	if(http_response == NULL)
+	{
+		printf("didn't receive HTTP response, we might be rate-limited. Waiting 60s");
+		sleep(60);
+		return NULL;
+	}
+	json_object *lichessUser = json_tokener_parse(http_response);
+	json_object *profile = json_object_object_get(lichessUser,"profile");
+	return profile;
+}

lichess.h

@@ -0,0 +1,9 @@
+#ifndef WIKIBOT_LICHESS_H
+#define WIKIBOT_LICHESS_H
+
+#include "http.h"
+#include <json-c/json_object.h>
+
+json_object* query_lichess(char* username);
+
+#endif // WIKIBOT_LICHESS_H

main.c

@@ -0,0 +1,72 @@
+/*
+ * main.c
+ * 
+ * Copyright 2020  <cpp@zom.bi>
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ * 
+ * 
+ */
+ 
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <json-c/json_object.h>
+
+#include "lichess.h"
+#include "http.h"
+
+int main(int argc, char **argv)
+{
+	// json_object *profile = malloc(1);
+	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];
+		line[strlen(line)-1] = '\0';
+		json_object *profile = query_lichess(line);
+		if(profile == NULL)
+		{
+			printf("No profile for %s\n", line);
+			continue;
+		}
+		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\n",line);
+			continue;
+		}
+		strcpy(name,firstName);
+		strcat(name," ");
+		strcat(name,lastName);
+		sprintf(outline, "%s,%s\n",line,name);
+		printf("OK\n");
+		fputs(outline,output);
+	}
+	fclose(output);
+	fclose(playersfile);
+	return 0;
+}

main.h

@@ -0,0 +1 @@
+