/** 连接网络读取数据 */
@Override
protected <T> void connectWithRetries(AbstractRequest<T> request, InternalResponse response)
throws HttpClientException, HttpNetException, HttpServerException {
// if(true) {
// throw new HttpNetException(NetException.NetworkDisabled);
// }
// 1. create apache request
final HttpUriRequest apacheRequest = createApacheRequest(request);
// 2. update http header
if (request.getHeaders() != null) {
Set<Entry<String, String>> set = request.getHeaders().entrySet();
for (Entry<String, String> en : set) {
apacheRequest.setHeader(new BasicHeader(en.getKey(), en.getValue()));
}
}
// 3. try to connect
HttpListener<T> listener = request.getHttpListener();
StatisticsListener statistic = response.getStatistics();
int times = 0,
maxRetryTimes = request.getMaxRetryTimes(),
maxRedirectTimes = request.getMaxRedirectTimes();
boolean retry = true;
IOException cause = null;
while (retry) {
try {
cause = null;
retry = false;
if (request.isCancelledOrInterrupted()) {
return;
}
if (statistic != null) {
statistic.onPreConnect(request);
}
HttpResponse ares = mHttpClient.execute(apacheRequest);
if (statistic != null) {
statistic.onAfterConnect(request);
}
// status
StatusLine status = ares.getStatusLine();
HttpStatus httpStatus = new HttpStatus(status.getStatusCode(), status.getReasonPhrase());
response.setHttpStatus(httpStatus);
// header
Header[] headers = ares.getAllHeaders();
if (headers != null) {
com.litesuits.http.data.NameValuePair hs[] =
new com.litesuits.http.data.NameValuePair[headers.length];
for (int i = 0; i < headers.length; i++) {
String name = headers[i].getName();
String value = headers[i].getValue();
if ("Content-Length".equalsIgnoreCase(name)) {
response.setContentLength(Long.parseLong(value));
}
hs[i] = new com.litesuits.http.data.NameValuePair(name, value);
}
response.setHeaders(hs);
}
// data body
if (status.getStatusCode() <= 299 || status.getStatusCode() == 600) {
// 成功
HttpEntity entity = ares.getEntity();
if (entity != null) {
// charset
String charSet = getCharsetFromEntity(entity, request.getCharSet());
response.setCharSet(charSet);
// is cancelled ?
if (request.isCancelledOrInterrupted()) {
return;
}
// length
long len = response.getContentLength();
DataParser<T> parser = request.getDataParser();
if (statistic != null) {
statistic.onPreRead(request);
}
parser.readFromNetStream(entity.getContent(), len, charSet);
if (statistic != null) {
statistic.onAfterRead(request);
}
response.setReadedLength(parser.getReadedLength());
endEntityViaReflection(entity);
}
return;
} else if (status.getStatusCode() <= 399) {
// redirect
if (response.getRedirectTimes() < maxRedirectTimes) {
// get the location header to find out where to redirect to
Header locationHeader = ares.getFirstHeader(Consts.REDIRECT_LOCATION);
if (locationHeader != null) {
String location = locationHeader.getValue();
if (location != null && location.length() > 0) {
if (!location.toLowerCase().startsWith("http")) {
URI uri = new URI(request.getFullUri());
URI redirect = new URI(uri.getScheme(), uri.getHost(), location, null);
location = redirect.toString();
}
response.setRedirectTimes(response.getRedirectTimes() + 1);
request.setUri(location);
if (HttpLog.isPrint) {
HttpLog.i(TAG, "Redirect to : " + location);
}
if (listener != null) {
listener.notifyCallRedirect(
request, maxRedirectTimes, response.getRedirectTimes());
}
connectWithRetries(request, response);
return;
}
}
throw new HttpServerException(httpStatus);
} else {
throw new HttpServerException(ServerException.RedirectTooMuch);
}
} else if (status.getStatusCode() <= 499) {
// 客户端被拒
throw new HttpServerException(httpStatus);
} else if (status.getStatusCode() < 599) {
// 服务器有误
throw new HttpServerException(httpStatus);
}
} catch (IOException e) {
cause = e;
} catch (NullPointerException e) {
// bug in HttpClient 4.0.x, see http://code.google.com/p/android/issues/detail?id=5255
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.GINGERBREAD) {
cause = new IOException(e.getMessage());
} else {
cause = new IOException(e);
}
} catch (URISyntaxException e) {
throw new HttpClientException(e);
} catch (IllegalStateException e) {
// for apache http client. if url is illegal, it usually raises an exception as
// "IllegalStateException:
// Scheme 'xxx' not registered."
throw new HttpClientException(e);
} catch (SecurityException e) {
throw new HttpClientException(e, ClientException.PermissionDenied);
} catch (RuntimeException e) {
throw new HttpClientException(e);
}
if (cause != null) {
try {
if (request.isCancelledOrInterrupted()) {
return;
}
times++;
retry =
retryHandler.retryRequest(
cause, times, maxRetryTimes, mHttpContext, config.getContext());
} catch (InterruptedException e) {
e.printStackTrace();
return;
}
if (retry) {
response.setRetryTimes(times);
if (HttpLog.isPrint) {
HttpLog.i(TAG, "LiteHttp retry request: " + request.getUri());
}
if (listener != null) {
listener.notifyCallRetry(request, maxRetryTimes, times);
}
}
}
}
if (cause != null) {
throw new HttpNetException(cause);
}
}
@Override
@SuppressWarnings("unchecked")
protected ResultType doBackground() throws Throwable {
if (this.isCancelled()) {
throw new Callback.CancelledException("cancelled before request");
}
// 初始化请求参数
ResultType result = null;
boolean retry = true;
int retryCount = 0;
Throwable exception = null;
HttpRetryHandler retryHandler = new HttpRetryHandler(this.params.getMaxRetryCount());
request = initRequest();
if (this.isCancelled()) {
throw new Callback.CancelledException("cancelled before request");
}
// 检查缓存
Object cacheResult = null;
if (cacheCallback != null && HttpMethod.permitsCache(params.getMethod())) {
// 尝试从缓存获取结果, 并为请求头加入缓存控制参数.
while (retry) {
try {
clearRawResult();
rawResult = this.request.loadResultFromCache();
break;
} catch (Throwable ex) {
LogUtil.w("load disk cache error", ex);
exception = ex;
retry = retryHandler.retryRequest(ex, ++retryCount, this.request);
}
}
if (this.isCancelled()) {
clearRawResult();
throw new Callback.CancelledException("cancelled before request");
}
if (rawResult != null) {
if (prepareCallback != null) {
try {
cacheResult = prepareCallback.prepare(rawResult);
} catch (Throwable ex) {
cacheResult = null;
LogUtil.w("prepare disk cache error", ex);
} finally {
clearRawResult();
}
} else {
cacheResult = rawResult;
}
if (this.isCancelled()) {
throw new Callback.CancelledException("cancelled before request");
}
if (cacheResult != null) {
// 同步等待是否信任缓存
this.update(FLAG_CACHE, cacheResult);
while (trustCache == null) {
synchronized (cacheLock) {
try {
cacheLock.wait();
} catch (Throwable ignored) {
}
}
}
// 处理完成
if (trustCache) {
return null;
}
}
}
}
if (trustCache == null) {
trustCache = false;
}
if (cacheResult == null) {
this.request.clearCacheHeader();
}
// 发起请求
retry = true;
while (retry) {
try {
if (this.isCancelled()) {
throw new Callback.CancelledException("cancelled before request");
}
// 由loader发起请求, 拿到结果.
this.request.close(); // retry 前关闭上次请求
try {
clearRawResult();
requestWorker = new RequestWorker(this.request, this.loadType);
if (params.isCancelFast()) {
requestWorker.start();
requestWorker.join();
} else {
requestWorker.run();
}
if (requestWorker.ex != null) {
throw requestWorker.ex;
}
rawResult = requestWorker.result;
} catch (Throwable ex) {
clearRawResult();
if (this.isCancelled()) {
throw new Callback.CancelledException("cancelled during request");
} else {
throw ex;
}
}
if (prepareCallback != null) {
try {
result = (ResultType) prepareCallback.prepare(rawResult);
} finally {
clearRawResult();
}
} else {
result = (ResultType) rawResult;
}
// 保存缓存
if (cacheCallback != null && HttpMethod.permitsCache(params.getMethod())) {
this.request.save2Cache();
}
retry = false;
if (this.isCancelled()) {
throw new Callback.CancelledException("cancelled after request");
}
} catch (Throwable ex) {
if (this.request.getResponseCode() == 304) { // disk cache is valid.
return null;
} else {
exception = ex;
retry = retryHandler.retryRequest(ex, ++retryCount, this.request);
}
}
}
if (exception != null && result == null && !trustCache) {
throw exception;
}
return result;
}