代理访问网页，拿到图片，文件最终指向地址
网页中会用到很多相对路径 ../等
1 if (url.startsWith("../")) { 2 String link = getRealLink(hostUrl.getPath()); 3 String[] str = hostUrl.getPath().split("/"); 4 int len = url.split("\\.\\./").length; 5 String s = ""; 6 if (link.split("/").length != 3) { 7 for (int i = 0; i < str.length - len; i++) { 8 s += str[i] + "/"; 9 } 10 url = s + url.replaceAll("\\.\\./", ""); 11 } else { 12 url = link + "/" + url.replaceAll("\\.\\./", ""); 13 } 14 }
1 /** 2 * 获得最终访问地址 3 * 4 * @param link 5 * @return 6 * @throws ProtocolException 7 */ 8 private String getRealLink(String link) { 9 DefaultHttpClient httpClient = new DefaultHttpClient(); 10 HttpGet httpget = new HttpGet(link); 11 HttpContext context = new BasicHttpContext(); 12 HttpResponse response = null; 13 try { 14 response = httpClient.execute(httpget, context); 15 } catch (ClientProtocolException e1) { 16 } catch (IOException e1) { 17 } 18 if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) 19 try { 20 throw new IOException(response.getStatusLine().toString()); 21 } catch (IOException e) { 22 } 23 HttpUriRequest currentReq = (HttpUriRequest) context.getAttribute(ExecutionContext.HTTP_REQUEST); 24 HttpHost currentHost = (HttpHost) context.getAttribute(ExecutionContext.HTTP_TARGET_HOST); 25 link = (currentReq.getURI().isAbsolute()) ? currentReq.getURI().toString() : (currentHost.toURI() + currentReq 26 .getURI()); 27 return link; 28 }
简单记录下！
来自：http://stackoverflow.com/questions/1456987/httpclient-4-how-to-capture-last-redirect-url
