Question

我正在尝试使用HTTP POST将大文件发送到服务器。我可以发送4kB或更少的文件，但当我尝试发送1.5MB的文件时，似乎有一段时间。服务器在不发送数据的情况下断开连接

有谁知道如何解决这个问题？

代码是： void readdata（） {

  //Variables for WiFi Shield
  char ssid[] = "Example";           //your network SSID (name)
  char pass[] = "Example1";           
  char server[] = "http://example.com";

  while (status != WL_CONNECTED) {
    Serial.print(F("Attempting to connect to SSID: "));
    Serial.println(ssid);

    status = WiFi.begin(ssid, pass);

    // wait 1 second for connection:
    delay(1000);
  }
  Serial.println(F("Connected to wifi"));
 // #endif

  // check for the presence of the shield:
  if (WiFi.status() == WL_NO_SHIELD) {
    Serial.println(F("WiFi shield not present"));
    // don't continue:
   while (true);
  }
logfile=SD.open("LOG0038.CSV");
filesize=logfile.size();
  logfile.close();

  int fileLength = 0;
  fileLength = 137 + filesize + 40;
  Serial.println(filesize);

  Serial.println(F("\nStarting connection to server..."));
  Serial.println(server);
  // if you get a connection, report back via serial:
  if (client.connect(server, 80)) {
    Serial.println(F("connected to server"));

    // Make a HTTP request:

  client.setTimeout(Time);
  client.print(F("POST /uploadf HTTP/1.1\r\n"));
  client.print(F("Host: example.com\r\n"));
  client.print(F("User-Agent: Frank/1.0\r\n"));
  client.print(F("Accept-Encoding: gzip, deflate\r\n"));
  client.print(F("Accept: */*\r\n"));
  client.print(F("Connection: keep-alive\r\n"));
  client.print(F("Content-Length: "));
  client.print(fileLength);
  client.print(F("\r\n"));
  client.print(F("Content-Type: multipart/form-data; boundary=710ff0c6cf2d4c73b12db64cab12e58c\r\n"));
  client.print(F("\r\n"));
  client.print(F("--710ff0c6cf2d4c73b12db64cab12e58c\r\nContent-Disposition: form-data; name=\"file\"; filename=\""));
  client.print("1000LOG0032.CSV");
  client.print(F("\""));
  client.print(F("\r\n"));
  client.print(F("Content-Type: text/plain\r\n\r\n"));
  logfile=SD.open("LOG0038.CSV");
  while(logfile.available()){
    while(logfile.position() < logfile.size()){
      String dataBuff = logfile.readStringUntil('\n');
      client.print(dataBuff);
     // Serial.println(dataBuff);
      client.print("\n");
    }
  }
  client.print(F("\r\n--710ff0c6cf2d4c73b12db64cab12e58c--\r\n"));
  //client.flush();
  }

  while(client.connected()){
    while (client.available()&& status==WL_CONNECTED) {
      char c = client.read();
     Serial.write(c);
   }
  }

  // if the server's disconnected, stop the client:
  if (!client.connected()) {
    Serial.print(F("\r\n"));
    Serial.println(F("disconnecting from server."));
 //   client.flush();
    client.stop();

  } 
 logfile.close();
 while (true);
  }

Answer 1

这可能不是一个真正的答案，但不幸的是，我没有必要的声誉来将此作为评论。

我对arduino一无所知，但无论何时使用POST，都应该有一个限制max_post_size的选项。在基本的LAMP设置中，它通常出现在.httaccess中。

我希望这可以帮助您排除故障。

为什么Arduino上的HTTP POST无法发送大文件

1 个答案: