我目前正在开发Android应用程序,使用okttp3进行简单的GET请求。 我正在将我的flask应用程序用作API端点。 Android代码:
OkHttpClient client = new OkHttpClient();
final Request request = new Request.Builder()
.url(url)
.build();
client.newCall(request).enqueue(new Callback() {
@Override
public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
String s = response.body().string();
System.out.println(s);
}
@Override
public void onFailure(@NotNull Call call, @NotNull IOException e) {
System.out.println(e.getMessage());
}
});
Flask框架代码
@app.route('/abc', methods=["GET"])
def abc():
return jsonify({"test": "abc"})
当我使用POSTMAN发出请求时,没有任何问题: postman的get请求 然而,当我使用上面的Java代码时,有时它可以工作,有时我会得到以下错误:
D/OkHttp: java.net.ProtocolException: unexpected end of stream
at okhttp3.internal.http1.Http1ExchangeCodec$FixedLengthSource.read(Http1ExchangeCodec.kt:389)
at okhttp3.internal.connection.Exchange$ResponseBodySource.read(Exchange.kt:276)
at okio.Buffer.writeAll(Buffer.kt:1655)
at okio.RealBufferedSource.readString(RealBufferedSource.kt:95)
at okhttp3.ResponseBody.string(ResponseBody.kt:187)
at com.example.teste.MainActivity$2.onResponse(MainActivity.java:83)
at okhttp3.internal.connection.RealCall$AsyncCall.run(RealCall.kt:504)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
D/OkHttp: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:764)
我尝试过其他帖子中提出的多种解决方案,例如:
OkHttpClient client = new OkHttpClient.Builder()
.retryOnConnectionFailure(true)
.build();
或者
Request request = new Request.Builder()
.addHeader("Authorization", "Bearer " + apiToken)
.addHeader("content-type", "application/json")
.addHeader("Connection","close")
.url(uri)
.build();
但是它们都没有起作用。这里的问题是什么?我已经试过使用相同的代码向其他虚拟 API 发出请求,它总是有效的。我的 Flask API 缺少了什么?
错误发生在这里:
val read = super.read(sink, minOf(bytesRemaining, byteCount))
if (read == -1L) {
connection.noNewExchanges() // The server didn't supply the promised content length.
val e = ProtocolException("unexpected end of stream")
responseBodyComplete()
throw e
}
这与服务器提供的内容长度有关。我该如何解决?