我与请求JSON数据的Web服务器进行HTTP通信。我想用Content-Encoding: gzip
压缩这个数据流。有没有办法在我的HttpClient中设置Accept-Encoding: gzip
?在Android参考中搜索gzip
不会显示与HTTP相关的任何内容,因为您可以看到here。
答案 0 :(得分:173)
您应该使用http标头来指示连接可以接受gzip编码数据,例如:
HttpUriRequest request = new HttpGet(url);
request.addHeader("Accept-Encoding", "gzip");
// ...
httpClient.execute(request);
检查内容编码的响应:
InputStream instream = response.getEntity().getContent();
Header contentEncoding = response.getFirstHeader("Content-Encoding");
if (contentEncoding != null && contentEncoding.getValue().equalsIgnoreCase("gzip")) {
instream = new GZIPInputStream(instream);
}
答案 1 :(得分:33)
如果您使用的是API级别8或更高级别,则AndroidHttpClient。
它有辅助方法,如:
public static InputStream getUngzippedContent (HttpEntity entity)
和
public static void modifyRequestToAcceptGzipResponse (HttpRequest request)
导致更简洁的代码:
AndroidHttpClient.modifyRequestToAcceptGzipResponse( request );
HttpResponse response = client.execute( request );
InputStream inputStream = AndroidHttpClient.getUngzippedContent( response.getEntity() );
答案 2 :(得分:13)
我认为此链接的代码示例更有趣: ClientGZipContentCompression.java
他们正在使用 HttpRequestInterceptor 和 HttpResponseInterceptor
请求样本:
httpclient.addRequestInterceptor(new HttpRequestInterceptor() {
public void process(
final HttpRequest request,
final HttpContext context) throws HttpException, IOException {
if (!request.containsHeader("Accept-Encoding")) {
request.addHeader("Accept-Encoding", "gzip");
}
}
});
答案示例:
httpclient.addResponseInterceptor(new HttpResponseInterceptor() {
public void process(
final HttpResponse response,
final HttpContext context) throws HttpException, IOException {
HttpEntity entity = response.getEntity();
Header ceheader = entity.getContentEncoding();
if (ceheader != null) {
HeaderElement[] codecs = ceheader.getElements();
for (int i = 0; i < codecs.length; i++) {
if (codecs[i].getName().equalsIgnoreCase("gzip")) {
response.setEntity(
new GzipDecompressingEntity(response.getEntity()));
return;
}
}
}
}
});
答案 3 :(得分:1)
我没有使用过GZip,但我认为你应该使用HttpURLConnection
或HttpResponse
作为GZIPInputStream
的输入流,而不是某些特定的其他类。
答案 4 :(得分:0)
就我而言,就像这样:
URLConnection conn = ...;
InputStream instream = conn.getInputStream();
String encodingHeader = conn.getHeaderField("Content-Encoding");
if (encodingHeader != null && encodingHeader.toLowerCase().contains("gzip"))
{
instream = new GZIPInputStream(instream);
}