Android多部件POST http请求415错误

Question

初学android开发人员在这里。我正在尝试将.gpx文件发布到我的Web数据库。但是，我收到http响应错误415.我知道415意味着不正确的内容类型和我试图使用的API有此代码..感谢您的任何提示！

 // Test that request has correct content type 
     if (!Request.Content.IsMimeMultipartContent()) 
     { 
      throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType); 
     } 

我按照本教程http://www.codejava.net/java-se/networking/upload-files-by-sending-multipart-request-programmatically。

这是我的HTTP请求类

/** 
* This constructor initializes a new HTTP POST request with content type 
* is set to multipart/form-data 
* @param requestURL 
* @param charset 
* @throws IOException 
*/ 
public MultipartUtility(String requestURL, String charset) 
     throws IOException { 
    this.charset = charset; 

    // creates a unique boundary based on time stamp 
    boundary = "===" + System.currentTimeMillis() + "==="; 

    URL url = new URL(requestURL); 
    httpConn = (HttpURLConnection) url.openConnection(); 
    httpConn.setUseCaches(false); 
    httpConn.setDoOutput(true); // indicates POST method 
    httpConn.setDoInput(true); 
    httpConn.setRequestMethod("POST"); 

    httpConn.setRequestProperty("Connection", "Keep-Alive"); 
    httpConn.setRequestProperty("Content-Type", // content type multipart (FILE) 
      "multipart/form-data; boundary=" + boundary); 
    httpConn.setRequestProperty("Authorization", UserInfo.User.getToken()); 
    outputStream = httpConn.getOutputStream(); 
    writer = new PrintWriter(new OutputStreamWriter(outputStream, charset), 
      true); 
} 

/** 
* Adds a form field to the request 
* @param name field name 
* @param value field value 
*/ 
public void addFormField(String name, String value) { 
    writer.append("--" + boundary).append(LINE_FEED); 
    writer.append("Content-Disposition: form-data; name=\"" + name + "\"") 
      .append(LINE_FEED); 
    //writer.append("Content-Type: text/plain; charset=" + charset).append(LINE_FEED); 
    writer.append(LINE_FEED); 
    writer.append(value).append(LINE_FEED); 
    writer.flush(); 
} 

/** 
* Adds a upload file section to the request 
* @param fieldName name attribute in <input type="file" name="..." /> 
* @param uploadFile a File to be uploaded 
* @throws IOException 
*/ 
public void addFilePart(String fieldName, File uploadFile) 
     throws IOException { 
    String fileName = uploadFile.getName(); 
    writer.append("--" + boundary).append(LINE_FEED); 
    writer.append(
      "Content-Disposition: form-data; name=\"" + fieldName 
        + "\"; filename=\"" + fileName + "\""); 
    //Log.i("fileName",fileName); 
    writer.append("Content-Type: " + "multipart/form-data; boundary=" + boundary); 
    //.append("Content-Transfer-Encoding: binary").append(LINE_FEED); 
    writer.append(LINE_FEED); 
    writer.flush(); 

    FileInputStream inputStream = new FileInputStream(uploadFile); 
    byte[] buffer = new byte[4096]; 
    int bytesRead = -1; 
    while ((bytesRead = inputStream.read(buffer)) != -1) { 
     outputStream.write(buffer, 0, bytesRead); 
    } 
    outputStream.flush(); 
    inputStream.close(); 

    writer.append(LINE_FEED); 
    writer.flush(); 
} 

/** 
* Adds a header field to the request. 
* @param name - name of the header field 
* @param value - value of the header field 
*/ 
public void addHeaderField(String name, String value) { 
    writer.append(name + ": " + value).append(LINE_FEED); 
    writer.flush(); 
    //Log.i("header",name + ": " + value); 
} 

/** 
* Completes the request and receives response from the server. 
* @return a list of Strings as response in case the server returned 
* status OK, otherwise an exception is thrown. 
* @throws IOException 
*/ 
public List<String> finish() throws IOException { 
    List<String> response = new ArrayList<String>(); 

    writer.append(LINE_FEED).flush(); 
    writer.append("--" + boundary + "--").append(LINE_FEED); 
    writer.close(); 

    // checks server's status code first 
    int status = httpConn.getResponseCode(); 
    if (status == HttpURLConnection.HTTP_OK) { 
     BufferedReader reader = new BufferedReader(new InputStreamReader(
       httpConn.getInputStream())); 
     String line = null; 
     while ((line = reader.readLine()) != null) { 
      response.add(line); 
     } 
     reader.close(); 
     httpConn.disconnect(); 
    } else { 
     throw new IOException("Server returned non-OK status: " + status); 
    } 

    return response; 
} 

这是我的活动

 String requestURL = "url"; 


     try { 
      MultipartUtility multipart = new MultipartUtility(requestURL, charset); 

      multipart.addFilePart("filename", File); 

      List<String> response = multipart.finish(); 

      System.out.println("SERVER REPLIED:"); 

      for (String line : response) { 
       System.out.println(line); 
      } 
     } catch (IOException ex) { 
      System.err.println(ex); 
     } 
    } 

这是httpbin

/*I/System.out我的回应：服务器的回复：

I/System.out：{

I/System.out的： “ARGS”：{}，

I/System.out的： “数据”： “”，

I/System.out的： “文件”：{

I/System.out：“FileName”：“http：//www.topografix.com/GPX/1/1”version = \“1.0 \”> \ n \ n \ r \ n“

I/System.out的：}，

I/System.out的 “形式”：{}，

I /系统。出： “头”：{

I/System.out的： “接受编码”： “压缩”，

I/System.out的： “授权”： “承载”

我/ System.out：“Content-Length”：“322”，

I/System.out：“Content-Type”：“multipart/form-data; 边界==== 1488396069658 === “

I/System.out的： ”主机“： ”httpbin.org“，

I/System.out的： ”用户代理“：” 的Dalvik /2.1.0（Linux的; U;安卓7.0，安卓SDK构建的x86编译/ NYC）”

I/System.out的：}，

I/System.out的： “JSON”：空，

I/System.out：“origin”：“50.174.210.222”，

I/System.out的： “URL”： “​​”

I/System.out的：} */

如果其他人是否有这样的烦恼..我用RETROFIT2要成功上传我的文件。

//Retrofit2 method 
public void uploadFile() { 

    OkHttpClient.Builder okHttpClientBuilder = new OkHttpClient.Builder(); 
    HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor(); 
    interceptor.setLevel(HttpLoggingInterceptor.Level.BODY); 
    okHttpClientBuilder.addInterceptor(interceptor); 

    okHttpClientBuilder.addInterceptor(new Interceptor() { 
     @Override 
     public okhttp3.Response intercept(Chain chain) throws IOException { 
      okhttp3.Request original = chain.request(); 

      okhttp3.Request.Builder requestBuilder = original.newBuilder() 
        .header("Authorization", UserInfo.User.getToken()); 

      okhttp3.Request request = requestBuilder.build(); 
      return chain.proceed(request); 
     } 
    }); 


    MediaType MEDIA_TYPE_XML = MediaType.parse("application/xml"); 

    RequestBody filePart = RequestBody.create(MEDIA_TYPE_XML, gpx); 

    MultipartBody.Part file = MultipartBody.Part.createFormData("Track", gpx.getName(), filePart); 

    Retrofit.Builder builder = new Retrofit.Builder() 
      .baseUrl("URL") 
      .addConverterFactory(GsonConverterFactory.create()) 
      .client(okHttpClientBuilder.build()); 

    Retrofit retrofit = builder.build(); 

    UserClient client = retrofit.create(UserClient.class); 

    Call<ResponseBody> call = client.uploadFile(file); 
    call.enqueue(new Callback<ResponseBody>() { 
     @Override 
     public void onResponse(Call<ResponseBody> call, retrofit2.Response<ResponseBody> response) { 
      Log.i("works", call.toString()); 
     } 

     @Override 
     public void onFailure(Call<ResponseBody> call, Throwable t) { 
      Log.i("Fail", "gg"); 
     } 
    }); 
} 

我的接口

公共接口UserClient {

@Multipart 
@POST("Gpx") 
Call<ResponseBody> uploadFile(
     @Part MultipartBody.Part File 
     ); 

}

Answer 1

public static <C> C createService(Class<C> cClass) { 
     HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor(); 
     interceptor.setLevel(HttpLoggingInterceptor.Level.BODY); 
     OkHttpClient client = new OkHttpClient.Builder().addInterceptor(interceptor).build(); 
     Retrofit retrofit = new Retrofit.Builder() 
       .client(client) 
       .baseUrl(UrlManager.Manager.BASE_URL) 
       .build(); 
     return retrofit.create(cClass); 
    } 

这个代码创建了一个工厂，然后记录所有的中间件请求。这个代码曾经被调用过，每个关于请求的内容都会自动记录在logcat中。您可以通过键入okHTTp来进行过滤。

要使用拦截器：包括compile 'com.squareup.okhttp3:logging-interceptor:3.3.1'