rc_tagdetect_client: big_upload.c Source File

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 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
 #include "mongoose.h"
 
 static int handle_request(struct mg_connection *conn) {
   if (strcmp(conn->uri, "/upload") == 0) {
     FILE *fp = (FILE *) conn->connection_param;
     if (fp != NULL) {
       fwrite(conn->content, 1, conn->content_len, fp); // Write last bits
       mg_printf(conn, "HTTP/1.1 200 OK\r\n"
                 "Content-Type: text/plain\r\n"
                 "Connection: close\r\n\r\n"
                 "Written %ld of POST data to a temp file:\n\n",
                 (long) ftell(fp));
 
       // Temp file will be destroyed after fclose(), do something with the
       // data here -- for example, parse it and extract uploaded files.
       // As an example, we just echo the whole POST buffer back to the client.
       rewind(fp);
       mg_send_file_data(conn, fileno(fp));
       return MG_MORE;  // Tell Mongoose reply is not completed yet
     } else {
       mg_printf_data(conn, "%s", "Had no data to write...");
       return MG_TRUE; // Tell Mongoose we're done with this request
     }
   } else {
     mg_printf_data(conn, "%s",
                    "<html><body>Upload example."
                    "<form method=\"POST\" action=\"/upload\" "
                    "  enctype=\"multipart/form-data\">"
                    "<input type=\"file\" name=\"file\" /> <br/>"
                    "<input type=\"submit\" value=\"Upload\" />"
                    "</form></body></html>");
     return MG_TRUE;   // Tell mongoose to close this connection
   }
 }
 
 // Mongoose sends MG_RECV for every received POST chunk.
 // When last POST chunk is received, Mongoose sends MG_REQUEST, then MG_CLOSE.
 static int handle_recv(struct mg_connection *conn) {
   FILE *fp = (FILE *) conn->connection_param;
 
   // Open temporary file where we going to write data
   if (fp == NULL && ((conn->connection_param = fp = tmpfile())) == NULL) {
     return -1;  // Close connection on error
   }
 
   // Return number of bytes written to a temporary file: that is how many
   // bytes we want to discard from the receive buffer
   return fwrite(conn->content, 1, conn->content_len, fp);
 }
 
 // Make sure we free all allocated resources
 static int handle_close(struct mg_connection *conn) {
   if (conn->connection_param != NULL) {
     fclose((FILE *) conn->connection_param);
     conn->connection_param = NULL;
   }
   return MG_TRUE;
 }
 
 static int ev_handler(struct mg_connection *conn, enum mg_event ev) {
   switch (ev) {
     case MG_AUTH:     return MG_TRUE;
     case MG_REQUEST:  return handle_request(conn);
     case MG_RECV:     return handle_recv(conn);
     case MG_CLOSE:    return handle_close(conn);
     default:          return MG_FALSE;
   }
 }
 
 int main(void) {
   struct mg_server *server = mg_create_server(NULL, ev_handler);
   mg_set_option(server, "listening_port", "8080");
   printf("Starting on port %s\n", mg_get_option(server, "listening_port"));
 
   for (;;) {
     mg_poll_server(server, 1000);
   }
 
   mg_destroy_server(&server);
   return 0;
 }