OkHttp资源泄露问题

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已于 2023-04-13 11:17:57 修改

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文章标签： okhttp

于 2023-04-13 11:12:04 首次发布

本文链接：https://blog.youkuaiyun.com/weixin_59390140/article/details/130125996

OkHttp的Response.body().string()方法会处理响应体并将其转换为字符串。此过程会检测BOM或Content-Type来确定charset，如果未指定则默认使用UTF-8。若响应体过大，加载到内存可能引发OutOfMemoryError，因此建议对大响应体进行流式处理。

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OkHttp的返回值是Response, Response.body().string()会自动关闭流, 如果没有调用该方法, 需要手动关闭流: Response.body().close()

Response.body().string()源码, 使用了try语句关闭流

  /**
   * Returns the response as a string.
   *
   * <p>If the response starts with a <a href="https://en.wikipedia.org/wiki/Byte_order_mark">Byte
   * Order Mark (BOM)</a>, it is consumed and used to determine the charset of the response bytes.
   *
   * <p>Otherwise if the response has a Content-Type header that specifies a charset, that is used
   * to determine the charset of the response bytes.
   *
   * <p>Otherwise the response bytes are decoded as UTF-8.
   *
   * <p>This method loads entire response body into memory. If the response body is very large this
   * may trigger an {@link OutOfMemoryError}. Prefer to stream the response body if this is a
   * possibility for your response.
   */
  public final String string() throws IOException {
    try (BufferedSource source = source()) {
      Charset charset = Util.bomAwareCharset(source, charset());
      return source.readString(charset);
    }
  }