/**
* 尝试从缓存获取结果, 并为请求头加入缓存控制参数.
*
* @return
* @throws Throwable
*/
@Override
public Object loadResultFromCache() throws Throwable {
isLoading = true;
DiskCacheEntity cacheEntity =
LruDiskCache.getDiskCache(params.getCacheDirName()).get(this.getCacheKey());
if (cacheEntity != null) {
if (HttpMethod.permitsCache(params.getMethod())) {
Date lastModified = cacheEntity.getLastModify();
if (lastModified.getTime() > 0) {
params.addHeader("If-Modified-Since", toGMTString(lastModified));
}
String eTag = cacheEntity.getEtag();
if (!TextUtils.isEmpty(eTag)) {
params.addHeader("If-None-Match", eTag);
}
}
return loader.loadFromCache(cacheEntity);
} else {
return null;
}
}
/**
* invoke via Loader
*
* @throws IOException
*/
@Override
@TargetApi(Build.VERSION_CODES.KITKAT)
public void sendRequest() throws IOException {
isLoading = false;
URL url = new URL(queryUrl);
{ // init connection
Proxy proxy = params.getProxy();
if (proxy != null) {
connection = (HttpURLConnection) url.openConnection(proxy);
} else {
connection = (HttpURLConnection) url.openConnection();
}
connection.setInstanceFollowRedirects(true);
connection.setReadTimeout(params.getConnectTimeout());
connection.setConnectTimeout(params.getConnectTimeout());
if (connection instanceof HttpsURLConnection) {
((HttpsURLConnection) connection).setSSLSocketFactory(params.getSslSocketFactory());
}
}
{ // add headers
try {
Map<String, List<String>> singleMap =
COOKIE_MANAGER.get(url.toURI(), new HashMap<String, List<String>>(0));
List<String> cookies = singleMap.get("Cookie");
if (cookies != null) {
connection.setRequestProperty("Cookie", TextUtils.join(";", cookies));
}
} catch (Throwable ex) {
LogUtil.e(ex.getMessage(), ex);
}
HashMap<String, String> headers = params.getHeaders();
if (headers != null) {
for (Map.Entry<String, String> entry : headers.entrySet()) {
String name = entry.getKey();
String value = entry.getValue();
if (!TextUtils.isEmpty(name) && !TextUtils.isEmpty(value)) {
connection.setRequestProperty(name, value);
}
}
}
}
{ // write body
HttpMethod method = params.getMethod();
connection.setRequestMethod(method.toString());
if (HttpMethod.permitsRequestBody(method)) {
RequestBody body = params.getRequestBody();
if (body != null) {
if (body instanceof ProgressBody) {
((ProgressBody) body).setProgressHandler(progressHandler);
}
String contentType = body.getContentType();
if (!TextUtils.isEmpty(contentType)) {
connection.setRequestProperty("Content-Type", contentType);
}
long contentLength = body.getContentLength();
if (contentLength < 0) {
connection.setChunkedStreamingMode(256 * 1024);
} else {
if (contentLength < Integer.MAX_VALUE) {
connection.setFixedLengthStreamingMode((int) contentLength);
} else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
connection.setFixedLengthStreamingMode(contentLength);
} else {
connection.setChunkedStreamingMode(256 * 1024);
}
}
connection.setRequestProperty("Content-Length", String.valueOf(contentLength));
connection.setDoOutput(true);
body.writeTo(connection.getOutputStream());
}
}
}
LogUtil.d(queryUrl);
int code = connection.getResponseCode();
if (code >= 300) {
HttpException httpException = new HttpException(code, connection.getResponseMessage());
try {
httpException.setResult(IOUtil.readStr(connection.getInputStream(), params.getCharset()));
} catch (Throwable ignored) {
}
throw httpException;
}
{ // save cookies
try {
Map<String, List<String>> headers = connection.getHeaderFields();
if (headers != null) {
COOKIE_MANAGER.put(url.toURI(), headers);
}
} catch (Throwable ex) {
LogUtil.e(ex.getMessage(), ex);
}
}
isLoading = true;
}