init

curl_get_youtube_rss_link.c

@@ -0,0 +1,94 @@
+// @COMPILECMD gcc $@ -o $* -lcurl
+#include <stdio.h>
+#include <curl/curl.h>
+#include <stdlib.h>
+#include <string.h>
+
+typedef struct{
+	char *string;
+	size_t size;
+} Response;
+
+size_t write_chunk(void *data, size_t size, size_t nmemb, void *userdata);
+
+int main(int argc, char** argv){
+	if(argc != 2){
+		fprintf(stderr, "how to use: ./curl_get_youtube_rss_link BroCodez (aka. the youtube channel name as seen on the link when you are on that channel`s home or video page ... without the @\n");
+		exit(1);
+	}
+	CURL *curl;
+	CURLcode result;
+
+	curl = curl_easy_init();
+	if (curl == NULL){
+		fprintf(stderr, "HTTP request failed\n");
+		return -1;
+	}
+
+	Response response;
+	response.string = malloc(1);
+	response.size = 0;
+
+	char url[120];
+	sprintf(url, "https://www.youtube.com/@%s/videos", argv[1]);
+	curl_easy_setopt(curl, CURLOPT_URL, url);
+	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_chunk); 
+	curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *) &response);
+
+	result = curl_easy_perform(curl);
+	if (result != CURLE_OK){
+		fprintf(stderr, "Error: %s\n", curl_easy_strerror(result));
+		return -1;
+	}
+
+	int start_of_rss_link = 0;
+	int end_of_rss_link = 0;
+	for(int i = strlen(response.string); i != 0; i--){
+		if(response.string[i] == 102){
+			if(response.string[i+1] == 101){
+				if(response.string[i+2] == 101){
+					if(response.string[i+3] == 100){
+						if(response.string[i+4] == 115){
+							if(response.string[i+5] == 47){
+								start_of_rss_link = i-24;
+								end_of_rss_link = i+51;
+								char link[80];
+								int k = 0;
+								for(int j = start_of_rss_link; j <= end_of_rss_link; j++){
+									link[k] = response.string[j];
+									k++;
+									if(j == end_of_rss_link){
+										link[k] = '\0';
+									}
+								}
+								printf("%s\n", link);
+								return 0;
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+
+	curl_easy_cleanup(curl); 
+	free(response.string);
+
+	return 0;
+}
+
+size_t write_chunk(void *data, size_t size, size_t nmemb, void *userdata){
+	size_t real_size = size * nmemb; 
+	Response *response = (Response *) userdata; 
+
+	char *ptr = realloc(response->string, response->size + real_size + 1);
+	if (ptr == NULL){
+		return CURL_WRITEFUNC_ERROR;  
+	}
+	response->string = ptr;
+	memcpy(&(response->string[response->size]), data, real_size);
+	response->size += real_size;
+	response->string[response->size] = 0; // '\0';
+
+	return real_size;
+}