Question

我已在某些库中找到了一些代码，我想知道如何添加自定义标题

来自选项。它应该从JS到本机（Java）接收一些东西。我不是Java方面的专家。任何帮助将不胜感激。

这是它来自的存储库。 https://github.com/tranquangvu/react-native-uploader/

 ...

@ReactMethod
  public void upload(ReadableMap options, Callback complete) {

    final Callback completeCallback = complete;

    try {
      MultipartBody.Builder mRequestBody = new MultipartBody.Builder()
              .setType(MultipartBody.FORM);

      ReadableArray files = options.getArray("files");
      String url = options.getString("url");
      String method = options.getString("method");

      if(options.hasKey("params")){
        ReadableMap data = options.getMap("params");
        ReadableMapKeySetIterator iterator = data.keySetIterator();

        while(iterator.hasNextKey()){
          String key = iterator.nextKey();
          if(ReadableType.String.equals(data.getType(key))) {
            mRequestBody.addFormDataPart(key, data.getString(key));
          }
        }
      }

      if(files.size() != 0){
        for(int fileIndex=0 ; fileIndex<files.size(); fileIndex++){
          ReadableMap file = files.getMap(fileIndex);
          String uri = file.getString("filepath");

          Uri file_uri;
          if(uri.substring(0,10).equals("content://") ){
            file_uri = Uri.parse(convertMediaUriToPath(Uri.parse(uri)));
          }
          else{
            file_uri = Uri.parse(uri);
          }

          File imageFile = new File(file_uri.getPath());

          if(imageFile == null){
            Log.d(TAG, "FILE NOT FOUND");
            completeCallback.invoke("FILE NOT FOUND", null);
              return;
          }

          String mimeType = "image/png";
          if(file.hasKey("filetype")){
            mimeType = file.getString("filetype");
          }
          MediaType mediaType = MediaType.parse(mimeType);
          String fileName = file.getString("filename");
          String name = fileName;
          if(file.hasKey("name")){
            name = file.getString("name");
          }


          mRequestBody.addFormDataPart(name, fileName, RequestBody.create(mediaType, imageFile));
        }
      }

      MultipartBody requestBody = mRequestBody.build();
      Request request;

      // NOTE: The author seems added the header statically, I wonder how can I add a custom header.

      if(method.equals("PUT")) {
        request = new Request.Builder()
              .header("Accept", "application/json")
              .url(url)
              .put(requestBody)
              .build();
      }
      else{
        request = new Request.Builder()
              .header("Accept", "application/json")
              .url(url)
              .post(requestBody)
              .build();
      }   

      Response response = client.newCall(request).execute();
      if (!response.isSuccessful()) {
          Log.d(TAG, "Unexpected code" + response);
          completeCallback.invoke(response, null);
          return;
      }

      completeCallback.invoke(null, response.body().string());
    } catch(Exception e) {
      Log.d(TAG, e.toString());
    }
  }

Answer 1

只需指示okhttp.Request.Builder再插入一个标题：

request = new Request.Builder()
    .header("Accept", "application/json")
    .header("X-example-header", "example-value")
    .url(url)
    .put(requestBody)
    .build();

编辑（例如，专门针对那些拒绝自己阅读文档的人）：

或者使用类似的东西：

Request.Builder builder = new Request.Builder()
    .header("Accept", "application/json");
for(int i = 0; i < 10; i++) {
    builder.header("X-example-header-" + i, "example-value-" + i)
}
request = builder
    .url(url)
    .put(requestBody)
    .build();

如何在粘贴的代码中添加自定义标题？

1 个答案: