Hi I am trying to make 2 GET requests to a single connection. ie
HttpGet get1 = new HttpGet("http://www.google.com/search?q=HelloWorld");
HttpGet get2 = new HttpGet("http://www.google.com/search?q=SecondSearch");
HttpResponse response = null;
response = client.execute(get1);
response = client.execute(get2);
I would like to get the body from the second execution. Obviously this fails, because it says you must release the connection first. I need to maintain the exact session - for instance, if I navigate to a site where the first step is to login, I need to navigate to any subsequent pages with the same cookie.
It's probably something incredibly simple that I am doing wrong!
You need to use a CookieStore
CookieStore cookieStore = new BasicCookieStore();
DefaultHttpClient client1 = new DefaultHttpClient();
client1.setCookieStore(cookieStore);
HttpGet httpGet1 = new HttpGet("...");
HttpResponse response1 = client1.execute(httpGet1);
DefaultHttpClient client2 = new DefaultHttpClient();
client2.setCookieStore(cookieStore);
HttpGet httpGet2 = new HttpGet("...");
HttpResponse response2 = client2.execute(httpGet2);
In the above code, both client2 will re-use cookies from the client1 request.
Related
i do multiple request to the same url using httpclient.execute(request).
Can I re-use the connection for the consecutive requests?
how can i optimise the code without declaring HttpClient again and again.
for(int i=0;i<=50;i++)
{
HttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet("my_url");
HttpResponse response = client.execute(request);
System.out.println(response.getStatusLine().getStatusCode());
}
In order to use a single client in your code (based on Exception using HttpRequest.execute(): Invalid use of SingleClientConnManager: connection still allocated and Lars Vogel Apache HttpClient - Tutorial):
Step 1. Move the client generation outside the for-loop.
Step 2. You should read the response content and close the stream. If you don't do this you will get the following exception
Exception in thread "main" java.lang.IllegalStateException:
Invalid use of SingleClientConnManager: connection still allocated.
In code:
//step 1
HttpClient client = new DefaultHttpClient();
for(int i=0;i<=50;i++) {
HttpGet request = new HttpGet("my_url");
HttpResponse response = client.execute(request);
System.out.println(response.getStatusLine().getStatusCode());
//step 2
BufferedReader br = new BufferedReader(
new InputStreamReader(response.getEntity().getContent()));
//since you won't use the response content, just close the stream
br.close();
}
try below.
HttpUriRequest httpGet = new HttpGet(uri);
DefaultHttpClient defaultHttpClient = new DefaultHttpClient();
HttpResponse httpResponse = defaultHttpClient.execute(httpGet);
I have a problem with the HttpClient in Android: By using the following code, I want to use the cookies which are already set before by logging in through a webview. So the login data should be there and is indeed there, I tested it. But when I use the cookies in an httppost or httpget it doesn't use the login data. but these cookies actually should be enough to receive that page for which a login is necessary, shouldn't they? I'm not really sure if I need to send the cookies in a special way to the server or so or if it is enough to load it into the httpcontext. Here is the code:
DefaultHttpClient httpclient = new DefaultHttpClient();
CookieStore lCS = new BasicCookieStore();
if (CookieManager.getInstance().getCookie(pUrl) != null) {
String cookieString = CookieManager.getInstance().getCookie(pUrl);
String[] urlCookieArray = cookieString.split(";");
for (int i = 0; i < urlCookieArray.length; i++) {
System.out.println(urlCookieArray[i]);
String[] singleCookie = urlCookieArray[i].split("=");
Cookie urlCookie = new BasicClientCookie(singleCookie[0], singleCookie[1]);
lCS.addCookie(urlCookie);
}
}
HttpContext localContext = new BasicHttpContext();
httpclient.setCookieStore(lCS);
localContext.setAttribute(ClientContext.COOKIE_STORE, lCS);
HttpPost httppost = new HttpPost(pUrl);
// get the url connection
try {
StringBuilder sb = new StringBuilder();
HttpResponse response = httpclient.execute(httppost, localContext);
InputStream is = response.getEntity().getContent();
InputStreamReader isr = new InputStreamReader(is);
And if I run the code I only receive the login page of that site, so it didn't accept the cookie.
Thanks for help in advance
Greets, timo
I had the same problem and I used similar approach as in the question with no luck.
The thing that made it work for me was to add the domain for each copied cookie.
(BasicClientCookie cookie.setDomain(String))
My util function:
public static BasicCookieStore getCookieStore(String cookies, String domain) {
String[] cookieValues = cookies.split(";");
BasicCookieStore cs = new BasicCookieStore();
BasicClientCookie cookie;
for (int i = 0; i < cookieValues.length; i++) {
String[] split = cookieValues[i].split("=");
if (split.length == 2)
cookie = new BasicClientCookie(split[0], split[1]);
else
cookie = new BasicClientCookie(split[0], null);
cookie.setDomain(domain);
cs.addCookie(cookie);
}
return cs;
}
String cookies = CookieManager.getInstance().getCookie(url);
BasicCookieStore lCS = getCookieStore(cookies, MyApp.sDomain);
HttpContext localContext = new BasicHttpContext();
DefaultHttpClient httpclient = new DefaultHttpClient();
httpclient.setCookieStore(lCS);
localContext.setAttribute(ClientContext.COOKIE_STORE, lCS);
...
if you still have this problem, be careful with the given cookies, some might be malformed, check these two sites out:
http://www.codeproject.com/Articles/3106/On-The-Care-and-Handling-of-Cookies
this one helped me:
Getting "Set-Cookie" header
It seems you are copying the cookies correctly, and generally you don't need to do anything special for HttpClient to send the cookies. However, some of those may be bound to a session, and when you open a new connection with HttpClient you open a new session. The server will probably ignore cookies that don't match the current session. This might work if the session ID is in a cookie and you are able to get into the same session, but you really need to know exactly what the server does.
I have a an app that should send a GET request to a URL and send some cookies along with it. I've been looking at a few code examples for BasicCookieStore and Cookie classes, but I'm not able to figure out how to use them. Can anyone point me in the right direction?
To use cookies you need something along the lines of:
CookieStore cookieStore = new BasicCookieStore();
DefaultHttpClient httpclient = new DefaultHttpClient();
HttpContext ctx = new BasicHttpContext();
ctx.setAttribute(ClientContext.COOKIE_STORE, cookieStore);
HttpGet get = new HttpGet("your URL here");
HttpResponse response = httpclient.execute(get,ctx);
And if you want to keep cookies between requests, you have to reuse cookieStore and ctx for every request.
Also, you may read your cookieStore to see what's inside:
List<Cookie> cookies = cookieStore.getCookies();
if( !cookies.isEmpty() ){
for (Cookie cookie : cookies){
String cookieString = cookie.getName() + " : " + cookie.getValue();
Log.info(TAG, cookieString);
}
}
I have some Java code that I 'inherited' from a previous co-worker. Part of it connects to an outside URL using method GET and retrieves a small amount of XML for parsing. We've been having issues recently with this connection crashing our website due to the vendor website hanging and using up resources on our side. One issue is due to no timeouts being set when our code uses the HttpGet object. Is there a way to fine-tune timeouts using this object, or is there a better way to pull back this XML?
Would I be better off using another API?
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("param1","foobar"));
URI uri = URIUtils.createURI("http", "myhost.com", -1, "mypath",
URLEncodedUtils.format(params, "UTF-8"), null);
// there is no timeout here??
HttpGet httpGet = new HttpGet(uri);
HttpClient httpClient = new DefaultHttpClient();
HttpResponse httpResponse = httpClient.execute(httpGet);
String result = IOUtils.toString(httpResponse.getEntity()
.getContent(), "UTF-8");
Thanks!
try this instead
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("param1","foobar"));
URI uri = URIUtils.createURI("http", "myhost.com", -1, "mypath",
URLEncodedUtils.format(params, "UTF-8"), null);
HttpGet httpGet = new HttpGet(uri);
HttpClient httpClient = new DefaultHttpClient();
// set the connection timeout value to 30 seconds (30000 milliseconds)
final HttpParams httpParams = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParams, 30000);
httpClient = new DefaultHttpClient(httpParams);
HttpResponse httpResponse = httpClient.execute(httpGet);
String result = IOUtils.toString(httpResponse.getEntity().getContent(), "UTF-8");
From Java HTTP Client Request with defined timeout
When communicating with http to http://forecast.weather.gov/zipcity.php I need to obtain the URL that is generated from a request.
I have printed out the headers and their values from the http response message but there is no location header. How can I obtain this URL? (I'm using HttpClient)
It should be similar to:
HttpClient client = new DefaultHttpClient();
HttpParams params = client.getParams();
HttpClientParams.setRedirecting(params, false);
HttpGet method = new HttpGet("http://forecast.weather.gov/zipcity.php?inputstring=90210");
HttpResponse resp = client.execute(method);
String location = resp.getLastHeader("Location").getValue();
EDIT: I had to make a couple minor tweaks, but I tested and the above works.