HttpComponents组件特性探究
作者:网络转载 发布时间:[ 2012/11/26 10:37:29 ] 推荐标签:
}
/**
* Determine whether the given response indicates a GZIP response.
*
* The default implementation checks whether the HTTP "Content-Encoding"
* header contains "gzip" (in any casing).
*
* @param httpResponse the resulting HttpResponse to check
* @return whether the given response indicates a GZIP response
*/
protected boolean isGzipResponse(HttpResponse httpResponse) {
Header encodingHeader = httpResponse.getFirstHeader(HTTP_HEADER_CONTENT_ENCODING);
return (encodingHeader != null && encodingHeader.getValue() != null && encodingHeader
.getValue().toLowerCase().contains(ENCODING_GZIP));
}
/**
* Shutdown hook that closes the underlying
*{@link }org.apache.http.conn.ClientConnectionManager
* ClientConnectionManager}'s connection pool, if any.
*/
public void destroy() {
getHttpClient().getConnectionManager().shutdown();
}
enum HttpMethod {
GET,
POST,
HEAD,
OPTIONS,
PUT,
DELETE,
TRACE
}
}
下面是久经考验的httpClient 3的二次封装,如下:
[java] view plaincopyprint?
/**
* @author von gosling 2011-12-12
*/
public class HttpClientUtils {
private static final Logger log = LoggerFactory
.getLogger(HttpClientUtils.class);
private static int timeOut = 100;
private static int retryCount = 1;
private static int connectionTimeout = 100;
private static int maxHostConnections = 32; //根据apache work MPM设置此值
private static int maxTotalConnections = 512; //同上
private static String charsetName = "UTF-8";
public static JSONObject executeMethod(HttpClient httpClient, HttpMethod method) {
JSONObject result = new JSONObject();
StopWatch watch = new StopWatch();
int status = -1;
try {
log.info("Execute method({}) begin...", method.getURI());
watch.start();
status = httpClient.executeMethod(method);
watch.stop();
if (status == HttpStatus.SC_OK) {
InputStream inputStream = method.getResponseBodyAsStream();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
IOUtils.copy(inputStream, baos);
String response = new String(baos.toByteArray(), charsetName);
log.info("Response is:{}", response);
result = JSONObject.parseObject(response);
} else {
log.error("Http request failure! status is {}", status);
}
} catch (SocketTimeoutException e) {
log.error("Request time out!");//只关注请求超时,对于其它两类超时,使用通用异常捕获
} catch (Exception e) {
log.error("Error occur!", e);
} finally {
method.releaseConnection();
log.info("Method {},statusCode {},consuming {} ms", new Object[] { method.getName(),
status, watch.getTime() });
}
return result;
}
/**
* @param uri
* @param nameValuePairs
* @return
*/
public static PostMethod createPostMethod(String uri, NameValuePair[] nameValuePairs) {
PostMethod method = new PostMethod(uri);
method.addParameters(nameValuePairs);
method.getParams().setContentCharset(charsetName);
return method;
}
/**
* @param uri
* @param nameValuePairs
* @return
*/
public static GetMethod createGetMethod(String uri, NameValuePair[] nameValuePairs) {
GetMethod method = new GetMethod(uri);
List list = Lists.newArrayList();
if (nameValuePairs != null) {
Collections.addAll(list, nameValuePairs);
method.setQueryString(list.toArray(new NameValuePair[nameValuePairs.length]));
}
method.getParams().setContentCharset(charsetName);
return method;
}
public static HttpClient createHttpClient() {
//1.
HttpClient httpClient = new HttpClient(new MultiThreadedHttpConnectionManager());
//2.
HttpConnectionManagerParams httpConnectionManagerParams = httpClient
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