first http

SampleServer.c

+	
+/* Feel free to use this example code in any way
+   you see fit (Public Domain) */
+
+#include <sys/types.h>
+#ifndef _WIN32
+#include <sys/select.h>
+#include <sys/socket.h>
+#else
+#include <winsock2.h>
+#endif
+#include <microhttpd.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#if defined(_MSC_VER) && _MSC_VER+0 <= 1800
+/* Substitution is OK while return value is not used */
+#define snprintf _snprintf
+#endif
+
+#define PORT            8888
+#define POSTBUFFERSIZE  512
+#define MAXNAMESIZE     20
+#define MAXANSWERSIZE   512
+
+#define GET             0
+#define POST            1
+
+struct connection_info_struct
+{
+  int connectiontype;
+  char *answerstring;
+  struct MHD_PostProcessor *postprocessor;
+};
+
+const char *error_message =
+  "{ \"Messge \" : \"Error\" }\n";
+
+const char *havana_lyrics =
+  "{\n\"lyrics \" :\n\
+\"Havana ooh na-na ay\n\
+Half of my heart is in Havana ooh-na-na ay ay\n\
+He took me back to East Atlanta na-na-na\n\
+All of my heart is in Havana ay\n\
+There\'s somethin\' \'bout his manners uh huh\n\
+Havana ooh na-na\n}\n";
+
+const char *havana_singer =
+  "{ \"singer \" : \"Camila Cabello\" }\n";
+
+// 응답 전송
+static int send_page (struct MHD_Connection *connection, const char *page){
+  int ret;
+  struct MHD_Response *response;
+
+  response = MHD_create_response_from_buffer (strlen (page), (void *) page, MHD_RESPMEM_PERSISTENT);
+  
+  if (!response)
+    return MHD_NO;
+
+  ret = MHD_queue_response (connection, MHD_HTTP_OK, response);
+  MHD_destroy_response (response);
+
+  return ret;
+}
+
+// 노래가사 요청 시
+static int lyrics_post (void *coninfo_cls, enum MHD_ValueKind kind, const char *key,
+              const char *filename, const char *content_type,
+              const char *transfer_encoding, const char *data, uint64_t off,
+              size_t size)
+{
+  struct connection_info_struct *con_info = coninfo_cls;
+
+	// 노래제목 조회한다
+	if (0 == strcmp (key, "song")){
+  	
+	  // 노래제목이 havana
+		if(0 == strcmp (data, "havana")){
+				
+	    if ((size > 0) && (size <= MAXNAMESIZE)) {
+	    	
+	      char *answerstring;
+	      answerstring = malloc (MAXANSWERSIZE);
+	      if (!answerstring)
+	        return MHD_NO;
+
+	      snprintf (answerstring, MAXANSWERSIZE, havana_lyrics, data);
+	      con_info->answerstring = answerstring;
+	      
+  			printf("{\n \"%s\" : \"%s\"\n}\n", key, data);
+
+	    }
+	    else
+	      con_info->answerstring = NULL;
+
+		}
+  	
+  	return MHD_NO;
+  }
+  
+  return MHD_YES;
+}
+
+// 가수이름 요청 시
+static int singer_post (void *coninfo_cls, enum MHD_ValueKind kind, const char *key,
+              const char *filename, const char *content_type,
+              const char *transfer_encoding, const char *data, uint64_t off,
+              size_t size)
+{
+  struct connection_info_struct *con_info = coninfo_cls;
+
+	// 노래제목 조회한다
+	if (0 == strcmp (key, "song")){
+  	
+	  // 노래 제목 havana
+		if(0 == strcmp (data, "havana")){
+				
+	    if ((size > 0) && (size <= MAXNAMESIZE)) {
+	    	
+	      char *answerstring;
+	      answerstring = malloc (MAXANSWERSIZE);
+	      if (!answerstring)
+	        return MHD_NO;
+
+	      snprintf (answerstring, MAXANSWERSIZE, havana_singer, data);
+	      con_info->answerstring = answerstring;
+	      
+  			printf("{\n \"%s\" : \"%s\"\n}\n", key, data);
+	    }
+	    else
+	      con_info->answerstring = NULL;
+
+		}
+  	
+  	return MHD_NO;
+  }
+  
+     
+  return MHD_YES;
+}
+
+static void request_completed (void *cls, struct MHD_Connection *connection, 
+                   void **con_cls, enum MHD_RequestTerminationCode toe)
+{
+  struct connection_info_struct *con_info = *con_cls;
+
+  if (NULL == con_info)
+    return;
+
+  if (con_info->connectiontype == POST)
+    {
+      MHD_destroy_post_processor (con_info->postprocessor);
+      if (con_info->answerstring)
+        free (con_info->answerstring);
+    }
+
+  free (con_info);
+  *con_cls = NULL;
+}
+char get_key[10] = {0, };
+char get_value[10] = {0, };
+
+// MHD_get_connection_values 함수에서 인자로 사용
+// GET 전송 시 key-value 출력해주는 함수
+int print_out_key(void *cls, enum MHD_ValueKind kind, const char *key, const char *value){
+  printf("{\n \"%s\" : \"%s\"\n}\n", key, value);
+  snprintf (get_key, strlen(key) + 1, key);
+  snprintf (get_value, strlen(value) + 1, value);
+  
+	return MHD_YES;
+}
+
+// GET or POST 구분하여 send_page 호출
+// POST 일 경우 POST 프로세서 생성
+static int answer_to_connection (void *cls, struct MHD_Connection *connection,
+                      const char *url, const char *method,
+                      const char *version, const char *upload_data,
+                      size_t *upload_data_size, void **con_cls)
+{
+  if (NULL == *con_cls) {
+    struct connection_info_struct *con_info;
+
+    con_info = malloc (sizeof (struct connection_info_struct));
+    if (NULL == con_info)
+      return MHD_NO;
+    con_info->answerstring = NULL;
+    
+    if (0 == strcmp (method, "POST")) {
+    	
+	    // 가사 조회
+	    if (0 == strcmp (url, "/info/lyrics")){
+	    	con_info->postprocessor = MHD_create_post_processor (connection, POSTBUFFERSIZE, lyrics_post, (void *) con_info);
+      	
+	    }
+	    
+	    // 가수 조회
+	    else if (0 == strcmp (url, "/info/singer")){
+	    	con_info->postprocessor = MHD_create_post_processor (connection, POSTBUFFERSIZE, singer_post, (void *) con_info);
+
+	    }
+	    
+	    // 없는 api 조회
+	    else {
+  			return send_page (connection, error_message);
+	    }
+	    
+      if (NULL == con_info->postprocessor) {
+        	
+        free (con_info);
+	    	printf("con_info deallocate\n");
+        return MHD_NO;
+      }
+      
+      con_info->connectiontype = POST;
+    }
+    else if (0 == strcmp (method, "GET")){
+    	
+			struct MHD_Response *response;
+			int result;
+			
+	    // 2번째 인자 enum MHD_ValueKind : key-value pairs
+	    // MHD_GET_ARGUMENT_KIND : GET uri argument
+	    MHD_get_connection_values (connection, MHD_GET_ARGUMENT_KIND, &print_out_key, NULL);
+	    
+	    // 가사 조회
+	    if (0 == strcmp (url, "/info/lyrics")){
+	    	if((0 == strcmp(get_key, "song")) && (0 == strcmp(get_value, "havana"))){
+				response = MHD_create_response_from_buffer(strlen(havana_lyrics), (void *)havana_lyrics, MHD_RESPMEM_PERSISTENT);
+
+	    	}
+	    	else {
+	    		return send_page (connection, error_message);
+	    	}
+      	
+	    }
+	    
+	    // 가수 조회
+	    else if (0 == strcmp (url, "/info/singer")){
+	    	if((0 == strcmp(get_key, "song")) && 0 == (strcmp(get_value, "havana"))){
+				response = MHD_create_response_from_buffer(strlen(havana_singer), (void *)havana_singer, MHD_RESPMEM_PERSISTENT);
+
+	    	}
+	    	else {
+	    		return send_page (connection, error_message);
+	    	}
+      	
+	    }
+	    
+	    // 없는 api 조회
+	    else {
+  			return send_page (connection, error_message);
+	    }
+			
+			// 클라이언트에 전송할 응답큐에 넣는다.
+			// 클라이언트와 연결된 식별자로 상태코드와 응답 전송
+			result = MHD_queue_response(connection, MHD_HTTP_OK, response);
+			
+			MHD_destroy_response(response);
+			
+      con_info->connectiontype = GET;
+    }
+
+    *con_cls = (void *) con_info;
+
+    return MHD_YES;
+  }
+  
+  if (0 == strcmp (method, "POST"))
+    {
+      struct connection_info_struct *con_info = *con_cls;
+
+      if (*upload_data_size != 0) {
+      	
+          MHD_post_process (con_info->postprocessor, upload_data, *upload_data_size);
+          *upload_data_size = 0;
+
+          return MHD_YES;
+      }
+      else if (NULL != con_info->answerstring)
+        return send_page (connection, con_info->answerstring);
+    }
+
+  return send_page (connection, error_message);
+}
+
+int main ()
+{
+  struct MHD_Daemon *daemon;
+
+  daemon = MHD_start_daemon (MHD_USE_SELECT_INTERNALLY, PORT, NULL, NULL, &answer_to_connection, NULL,
+                             MHD_OPTION_NOTIFY_COMPLETED, request_completed,
+                             NULL, MHD_OPTION_END);
+  if (NULL == daemon)
+    return 1;
+
+  (void) getchar ();
+
+  MHD_stop_daemon (daemon);
+
+  return 0;
+}