okhttp之RequestBody

Okhttp裏面RequestBody是一個抽象類

抽象方法有：

1）public abstract @Nullable MediaType contentType();

2）public abstract void writeTo(BufferedSink sink) throws IOException;

 

非抽象方法：

1）

 public long contentLength() throws IOException {
    return -1;
  }

2）

1、參數是MediaType和String

 public static RequestBody create(@Nullable MediaType contentType, String content) {
    Charset charset = Util.UTF_8;
    if (contentType != null) {
      charset = contentType.charset();
      if (charset == null) {
        charset = Util.UTF_8;
        contentType = MediaType.parse(contentType + "; charset=utf-8");
      }
    }
    byte[] bytes = content.getBytes(charset);
    return create(contentType, bytes);
  }

2、參數是MediaType和ByteString

public static RequestBody create(
      final @Nullable MediaType contentType, final ByteString content) {
    return new RequestBody() {
      @Override public @Nullable MediaType contentType() {
        return contentType;
      }

      @Override public long contentLength() throws IOException {
        return content.size();
      }

      @Override public void writeTo(BufferedSink sink) throws IOException {
        sink.write(content);
      }
    };
  }

3、參數有4個：final @Nullable MediaType contentType,     final byte[] content,        final int offset,      final int byteCount

 public static RequestBody create(final @Nullable MediaType contentType, final byte[] content,
      final int offset, final int byteCount) {
    if (content == null) throw new NullPointerException("content == null");
    Util.checkOffsetAndCount(content.length, offset, byteCount);
    return new RequestBody() {
      @Override public @Nullable MediaType contentType() {
        return contentType;
      }

      @Override public long contentLength() {
        return byteCount;
      }

      @Override public void writeTo(BufferedSink sink) throws IOException {
        sink.write(content, offset, byteCount);
      }
    };
  }

4、參數是：final @Nullable MediaType contentType, final byte[] content

public static RequestBody create(final @Nullable MediaType contentType, final byte[] content) {
    return create(contentType, content, 0, content.length);
  }

5、參數是：final @Nullable MediaType contentType,         final File file

 public static RequestBody create(final @Nullable MediaType contentType, final File file) {
    if (file == null) throw new NullPointerException("file == null");

    return new RequestBody() {
      @Override public @Nullable MediaType contentType() {
        return contentType;
      }

      @Override public long contentLength() {
        return file.length();
      }

      @Override public void writeTo(BufferedSink sink) throws IOException {
        Source source = null;
        try {
          source = Okio.source(file);
          sink.writeAll(source);
        } finally {
          Util.closeQuietly(source);
        }
      }
    };
  }