使用MockWebServer返回gzip压缩的响应

Question

我在写涉及到使用OkHttp的gzip响应测试时遇到了问题。基本上我在做的是：

@Test
public void okHttp_whenResponseIsGzipped_returnsBody() throws Exception {
    MockWebServer mockWebServer = new MockWebServer();
    mockWebServer.start();

    mockWebServer.enqueue(new MockResponse()
            .addHeader("Content-Encoding", "gzip")
            .setBody(new String(compress("I AM BODY"))));

    OkHttpClient okHttpClient = new OkHttpClient();
    Request request = new Request.Builder().url(mockWebServer.url("")).build();
    Response response = okHttpClient.newCall(request).execute();

    assertThat(response.body().string(), equalTo("I AM BODY"));
}

public static byte[] compress(String data) throws IOException {
    ByteArrayOutputStream bos = new ByteArrayOutputStream(data.length());
    GZIPOutputStream gzip = new GZIPOutputStream(bos);
    gzip.write(data.getBytes());
    gzip.close();
    byte[] compressed = bos.toByteArray();
    bos.close();
    return compressed;
}

然而，当我运行这个测试时，在调用 response.body().string() 时出现错误：

java.io.IOException: ID1ID2: actual 0x00001fef != expected 0x00001f8b

at okio.GzipSource.checkEqual(GzipSource.java:205)
at okio.GzipSource.consumeHeader(GzipSource.java:120)
at okio.GzipSource.read(GzipSource.java:73)
at okio.RealBufferedSource.request(RealBufferedSource.java:68)
at okio.RealBufferedSource.rangeEquals(RealBufferedSource.java:417)
at okio.RealBufferedSource.rangeEquals(RealBufferedSource.java:401)
at okhttp3.internal.Util.bomAwareCharset(Util.java:471)
at okhttp3.ResponseBody.string(ResponseBody.java:175)

我压缩响应体的方法有问题吗？我需要更多工作来设置MockWebServer吗？

- seadowg

Answer 1

不要使用`new String(body)`，因为它会将其转换为字符串。改用`new Buffer().write(body)`，这样就不会转换了。"Original Answer"翻译成 "最初的回答"。

- Jesse Wilson