我在http请求中遇到了一些奇怪的行为。我有一些用户说这个调用永远不会返回(标记为异步调用的微调器永远不会消失)。我以前见过这种情况,但我把它归因于通过charles proxy的仿真器。直到现在我才在电话里看到它。
我不知道是什么原因造成的,所以我把它贴在这里。这是调用,使用jackson将结果反序列化为一个值对象。我看到模拟器冻结的两个点是httpclient.execute(httpget);和getobjectmapper().readvalue(jp,syncvo.class);。
在调试时,跳过有问题的语句会导致调试器永远无法获得对单步执行的控制。同时,我看到请求发出并通过charles从服务器返回。只是应用程序似乎没有得到响应,只是坐在那里。
所以,这是密码。谢谢你的帮助!
public SyncVO sync(String userId, long lastUpdate, boolean includeFetch) throws IOException {
SyncVO result = null;
String url = BASE_URL + "users/" + userId + "/sync" + "?" + "fetch=" + includeFetch;
if (lastUpdate > 0) {
url += "&updatedSince=" + lastUpdate;
}
DefaultHttpClient httpclient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(url);
httpGet.setHeader("Accept", "application/json");
httpGet.setHeader("Accept-Encoding", "gzip");
httpGet.setHeader(AUTHORIZATION, BEARER + " " + mOAuthToken);
httpclient.getParams().setParameter(CoreProtocolPNames.USER_AGENT, USER_AGENT_STRING);
httpclient.getParams().setBooleanParameter(CoreProtocolPNames.USE_EXPECT_CONTINUE, false);
HttpResponse response = httpclient.execute(httpGet);
if (isUnauthorized(response)) {
APPLICATION.needReauthentication();
return null;
}
if (response != null) {
InputStream stream = response.getEntity().getContent();
Header contentEncoding = response.getFirstHeader("Content-Encoding");
if (contentEncoding != null && contentEncoding.getValue().equalsIgnoreCase("gzip")) {
stream = new GZIPInputStream(stream);
}
InputStreamReader inReader = new InputStreamReader(stream, "UTF-8");
JsonParser jp = mJsonFactory.createJsonParser(inReader);
result = getObjectMapper().readValue(jp, SyncVO.class);
}
return result;
}
private ObjectMapper getObjectMapper() {
return (new ObjectMapper()
.configure(Feature.AUTO_DETECT_FIELDS, true)
.configure(Feature.FAIL_ON_UNKNOWN_PROPERTIES, false)
.configure(JsonParser.Feature.ALLOW_UNQUOTED_CONTROL_CHARS, true));
}
最佳答案
不要忘记在每次请求后使用实体内容。
HttpEntity entity = response.getEntity();
try {
if (entity != null)
entity.consumeContent();
} catch (IOException e) {
e.printStackTrace();
}
关于android - Android HTTP客户端卡住,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/10199767/