Android :: Injecting HTTP Header Into All Requests By Emulator
Mar 17, 2009
Is there an easy way to inject a header into all HTTP request sent from the emulator, including HTTP requests made by my app and also by the built-in web browser? I need this ability to model the behavior of a carrier gateway. I tried running the emulator through Fiddler as a proxy because I know how to manipulate HTTP requests in Fiddler, but that that didn't work. The emulator was successfully able to make the first HTTP request, but choked on subsequent ones. Reading this list, it seems that getting the emulator to use a proxy is not is not that easy. If this is the only way to do what I need, then I'll certainly give it another shot and post details about any problems I encounter. I am just wondering if perhaps there is an easier way to inject a header.
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Jan 13, 2010
Is there a limit on the number of simultaneous http requests of the form:
HttpResponse response = client.execute(request);
I'm interested in any official limit as well as practical ones.
(In a previous life, you had to dig deep to discover that WinMo only allowed three WebRequests to be open at a time.)
Let's say I have a list of 20 files to download on a background thread.
Should I: Download them one at a time, blocking the thread (but not the UI thread) to wait for each one? Start 20 threads each downloading one of the files?
I expect the answer may be somewhere in between, where I create C threads and work on the queue of N files, where C is a number like 3 or 4.
I suspect some of you here have already done some experimentation and know the magic number. In addition, I suspect there may be more efficient ways of doing what I'm doing than creating a new DefaultHttpClient for each request.
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Feb 23, 2010
Im using a web service, so I want to use an async thread for the HTTP authentication request and another thread later to make additional service requests while my main thread runs.Would like to see a good example of how to do this and how to show busy messages somehow in main app. How does the main app know when the thread finished? And what if my thread encounters exceptions, how do I deal with that?HTTP requests are sent later, use the same cookies setup up by the first auth request, so will the later requests pick up the same cookies and just work?
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Aug 29, 2010
I saw an message "page could not be loaded" in an app that I was using which made me realize that it's UI may be HTTP based somehow. Is there a way that I can find out where it is sending its requests?
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Jul 22, 2009
How to trace the HTTP requests/responses e.g. by using Wireshark? I am using soap web services i want tocheck wheather the soap request from the web service sis going properly.I neee the Xml response from the server but non xml format i am getting how to check this request and response using Wireahark or any other process.
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Jan 27, 2010
I have an app making an https post on one thread while performing a file download on another thread. For some odd reason, I am getting a ClientProtocolException saying that "The server failed to respond with a valid HTTP response". The error goes away if everything is run on a separate thread. Oddly if I run the two server requests in serial, the error goes away. It seems there's a bug that happens when two requests are made at the same time.
Important note: The post occurs to a different server than the download so the servers themselves should not be causing the problem. The code is simple. Here's the file download code:.............
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Aug 2, 2010
I have an application that is performing HTTP Requests (specifically calling the FogBugz API) when the user clicks certain buttons. Right now, I am just creating a service when the application starts, and then calling different methods in that service to complete requests. However, when I do this, there is the usual hang in the UI thread. I have looked at AsyncTask, but am not sure it will do what I want to accomplish. Because I need to instantly parse the XML that the HTTP Request returns, I need to have a process that is able to return this data to the UI thread. Will ASyncTask be able to accomplish this, or is there some other way.
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May 19, 2010
I am developing a microblogging platform in which I need to populate the page with Post (user defined class with fields) obtained from the Django server using HttpGet.In the client side(Android) I am using GSON to parse the responses from server to the type Post. So I require that server should send Post's one by one so as to add each of them to a list of Posts after parsing and then finally notifying the list adapter of changes in the data set after all Post's have been added.But the problem coming when intially loading the application, the page has to be populated with 10 latest Post's from the server. So I thought of a rather dirty way of sending 10 httpget requests to the server one after the other to the server. The code looks like this.I was thinking of executing it 10 times in a loop to get the 10 Post's I require. But in Django as far I know (correct me if I am wrong) there's no way to keep an index of the last sent Post to the client and so no way to send the 'next' Post on the next HttpGet request. So I am out of ideas.I feel there's a better way to do this efficiently.
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Jan 14, 2014
I'm trying to employ HttpResponseCache to cache each HTTP-request sent with HttpURLConnection.
why I get hit count always zero?
Code:
HttpResponseCache.getInstalled().getHitCount()
Usage:
Code:
for(int i = 0; i < 2; i++){
try {
HttpURLConnection connection = (HttpURLConnection) new URL("http://www.google.com").openConnection();
connection.setUseCaches(true);
if(i == 1){
try {
[code]....
On 2'nd run I have "NOT cached" in console and hit count == 0.
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Jul 20, 2012
I developed a game for Android called Jumping Bird, it writes the score obtained by the player in the database on my web server, but it does so synchronized. While it tries to write data in the database on the web, the entire game is stopped , and worse, when the server is slow, the request takes more than 5 or 10 seconds, an ANR(application not respond) error occurs and the OS tries to close the app.
I wonder how I can make that request asynchronous.There is any library that does it?
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Aug 11, 2010
I'm new in Java.
I'm trying to do code...
but said
The type Header is not generic; it cannot be parameterized with arguments <NameValuePair>
how I can do it?
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Feb 8, 2012
how to manipulate HTTP header on Android??
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Oct 22, 2009
I am developing applications for Android in a company where the Internet is accessable via a proxy server only. I found out that the emulator of the 1.5 R3 SDK works well with the option -http-proxy, but the emulator of the 1.6 R1 SDK does not. Is this a bug in the 1.6 R1 SDK? And if so, is there a chance this gets fixed in - let's say - 1.6 R2? Or am I just doing something wrong, though providing the same options for the 2 different emulator versions?
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Jan 12, 2010
I'm developing android application in my university that must use the internet through proxy server. In Android SDK 1.5 I use parameter - http-proxy when starting emulator and it working. But since Android SDK 1.6 until now (2.1) this approach is not working.
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Feb 19, 2010
I am trying to configure http_proxy settings for Internet access from Android emulator (behind a proxy). I tried following options:
1. -http-proxy option using emulator command.
2. setting http_proxy environment and then launching the emulator.
3. Settings proxy using APN settings (Telkilla) (this worked till Android 1.6 version)
4. adding an entry in settings. CODE:.........
I also checked -debug-proxy log messages and it showed below messages
CODE:..............
How can we access Internet from emulator (behind a proxy).
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Mar 24, 2010
I'm trying to use wireshark to capture some HTTP packets exchanged between the emulator and a website. However, even though I can see the web content on the emulator browser, wireshark does not display any HTTP packets exchanged between the emulator and the website. Why is this?
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Mar 24, 2009
I am having a specific problem that is preventing me using the android SDK from work. We are using a MS Proxy here that all internet traffic has to go through. The problem seems to be when the emulator is trying to access a site that uses 'Transfer-Encoding: chunked' If I attempt to download www.nds.com (no chunked encoding) into the browser, it works fine. However if I try to go to www.google.com (uses chunked encoding), the browser fails with the message: can't determine content length, and client wants to keep connection opened My feeling (and I'm no expert in this area) is that the underlying code managing the communication through the proxy is not dealing with the null terminator on the chunk encoded response when the connection to the proxy is being kept open? Does anyone have any experience in this area? Is the source to the emulator available so I can try and understand what is going on here?
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Oct 26, 2010
Let's say I want to perform a quick HTTP post to a website within my android app. If I were to set up the http client and send the post all in the onCreate method of the main screen (inside the UI thread) just for testing purposes, what would I use to quickly see what the response is to the post? I tried something quick and dirty below inside the onCreate method when the app first opens and nothing really happens, is there something more I need to do/obviously my toast idea is just bad.
HttpClient httpClient = new DefaultHttpClient();
HttpPost post = new HttpPost("http://forecast.weather.gov/zipcity.php?inputstring=04419");
HttpResponse httpResp;
try {
httpResp = httpClient.execute(post);
StatusLine status = httpResp.getStatusLine();
Toast.makeText(getApplicationContext(), (CharSequence) status, Toast.LENGTH_SHORT).show();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();}
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Aug 20, 2010
I would like to know if there is anyway to debug the HTTP response with the android emulator. my logs show that the response is not arriving complete to the application and i would like to know if it is the server that does not send the complete response or if my application is not processing the response completely.
I tried hooking up Fiddler and Blurp proxy, it actually works with Blurp proxy but only for HTTP and as you may guess i need it also for HTTPS
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Jan 6, 2010
I have touched on this question here, where Christopher gave an answer to this, but I dont really get it so I thought its time to make it a real question, not just a "follow up" =)
As it stands, the application Im writing has 4 different screens:
1. Screen 1 - list of nodes (main screen)
2. Screen 2 - options menu, tableLayout with buttons
3. Screen 3 - navigation
4. Screen 4 - text details on version etc
These screens can be navigated to/from using a "header" View that is placed on top. the header then has 4 different buttons:
+--------------------+
| menu with buttons |
+--------------------+
| |
| |
| |
| C O N T E N T |
| |
| |
| |
+--------------------+
The header is just an XML-file (header.xml) with a few buttons. That header.xml is the included in the Layouts using the include-markup. For example, the main.xml has the line:
<include layout="@layout/header"></include>
The header show up alright, but the question is - what is the correct approach to attach OnClickListeners for the buttons in the header?
Christopher pointed out that you could create an Activity class and do the hooks there, like this:
CODE:............
First, I cant make it work since the method setupHeaderButtons isnt accessible from FirstActivity.
Secondly, is this the right way to go at it?
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Sep 25, 2010
I'm at complete odds over configuring a proxy to inspect the HTTP(S) traffic for the app I'm developing. I've tried running Fiddler2 and Charles Web Proxy, both run on 127.0.0.1:888, and starting up the Android emulator with the parameter:
To test it out I open the Android browser. I see in Fiddler2 that the request is routed through the proxy. However, only RARELY does the request receive a successful response. In most, and when I say most I mean 99% of the time, the request is retried and fails again with the Android browser telling me "The server failed to communicate". Has anyone found a way to configure Fiddler2 or Charles for debugging HTTP(S) traffic through the Android emulator?
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Sep 16, 2009
Is it possible to view what requests are made to external sites/ servers by an app? Basically I'd kind of like to throw an application (I did not make) into a debugging type thing to see what requests (to where and what data) it makes. This is to kind of ensure a third party app does what it is saying, and isn't sending data elsewhere.
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Apr 12, 2010
How to collect URLs of all http/https requests made by the phone as well as well as the return status code and user agent from the headers. This information should be coming for all browser requests and other applications too.Please let me know this information can be retrieved on App level or we have to go to system level for this.
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Jul 22, 2010
I'm testing out a web page on the Android 2.0 and 2.2 emulators, and the jQuery.ajax() requests that the app makes have slightly different behaviors regarding HTTP Authentication Headers. The server I'm making requests to requires basic authentication, and the ajax requests in 2.2 send the proper auth header. In 2.0, I am debugging with Fiddler, and it seems that the requests do not include the auth header, and the server rejects the request with a 401.2 error. I don't think it matters, but the server is running IIS 7. One interesting thing I noticed while debugging the web requests is that Android 2.2 makes two requests for each resource, whether or not it's an XHR. One does not contain the Auth header, and the second one does. In 2.0, it seems to make 2 requests for everything but XHR's:
Here is the 2.2 header for the first XHR:
GET http://192.168.1.111/sonar/mobileweb/sonar/views/week/init.ejs HTTP/1.1
Host: 192.168.1.111
Accept-Encoding: gzip
Referer: http://192.168.1.111/sonar/mobileweb/sonar/sonar.html
Accept-Language: en-US
User-Agent: Mozilla/5.0 (Linux; U; Android 2.2; en-us; sdk Build/FRF91) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1
Accept: text/plain, */*
X-Requested-With: XMLHttpRequest
Accept-Charset: utf-8, iso-8859-1, utf-16, *;q=0.7
The 2.2 header for the second XHR:
GET http://192.168.1.111/sonar/mobileweb/sonar/views/week/init.ejs HTTP/1.1
Host: 192.168.1.111
Accept-Encoding: gzip
Referer: http://192.168.1.111/sonar/mobileweb/sonar/sonar.html
Accept-Language: en-US
User-Agent: Mozilla/5.0 (Linux; U; Android 2.2; en-us; sdk Build/FRF91) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1
Authorization: Basic cGFyaXZlZGFcZGF2aWQubW9ycmlzOjIzbkx2ZWxsbGw=
Accept: text/plain, */*
X-Requested-With: XMLHttpRequest
Accept-Charset: utf-8, iso-8859-1, utf-16, *;q=0.7
And the 2.0 header:
GET http://192.168.1.111/app/views/week/init.ejs HTTP/1.1
Host: 192.168.1.111
Accept-Encoding: gzip
Referer: http://192.168.1.111/app/app.html
Accept-Language: en-US
User-Agent: Mozilla/5.0 (Linux; U; Android 2.0; en-us; sdk Build/ECLAIR) AppleWebKit/530.17 (KHTML, like Gecko) Version/4.0 Mobile Safari/530.17
Accept: text/plain, */*
X-Requested-With: XMLHttpRequest
Accept-Charset: utf-8, iso-8859-1, utf-16, *;q=0.7
Has anyone experienced this behavior before? It is basically causing my app to not work at all in version 2.0. Version 2.1 seems to act the same as 2.0.
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Jun 2, 2010
I'm trying to load https requests with a Webkit object but It shows only a blank page, with http requests I don't have problems, It shows the page correctly. I have look the source code of the browser, in http://android.git.kernel.org/?p=platform/packages/apps/Browser.git;a... but I don't understand how the browser process the https requests. I think that the class BrowserActivity process the http and https requests but I don't see how to do it. Somebody could explain how the browser process the https request? It uses a Webview object to show the response of the https requests?
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Nov 7, 2010
The behavior of XMLHttpRequests in Android is very odd when doing cross domain requests. The browser should either fail with an error and not perform the request, or it should follow CORS (http:// www.w3.org/TR/access-control/) and start with an OPTIONS request to the remote domain. The Android browser (2.1 and 2.2) instead performs the request, which is received by the remote server (and this is the dangerous part both for data leaking and remote attacks), but the response is not set in the javascript (status of 0 and responseText null)
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Aug 19, 2010
I wrote an android application to request a scan for available WiFi signals around, using the WifiManager, then dump the results to a file. The program works fine, but this weird bug occurs. Initially I was requesting a scan every 30 seconds, and everything worked fine. I then tried to request a scan every two seconds, I get this strange bug. Everything will work fine for a few minutes, then the time between two scan requests jumps from 2 seconds to 50 seconds for no reason.
Then, for four more scans, it will scan at 2-second intervals, then skip to a 50-second interval, and it continues to do this consistently. With larger time intervals this bug does not appear. Has anyone experienced this bug before? Is there a way to prevent it? Or does Android automatically cancel scan requests if they are too frequent?
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Jul 29, 2010
Im looking for the concept of creating Java Server to handle Client requests and respond to it , i want to use Google App engine which does not allow Socket connections , so is the client & server in this case will communicate using Http requests? i'll be glad if someone could clarify the logic to me and provide a few lines of code.
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Nov 21, 2010
I read a lot about handling rotation in android applications, but I still have so many questions and need to much to understand. Let me explain my problem or implementation, that I'm using now in my application. If an activity will be opened, a get request will be sent to server. This request will be executed in a Thread (new Thread(...)) and if request was completed, activity's ui will be refreshed. But what should I do, if the user rotate his device?
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Jun 7, 2010
I'd like to create dynamic HTML in my app that will also include referecences to a few images. The images should not be resolved / requested by the internet, but instead I would like to somehow intercept these calls and then respond will classpath resources to those requests.I think this is similar how phonegap or titanium do this, but this is just an assumption.Does anyone know how webkit's resource loading can be intercepted and resources can be served from a local cache/ classpath intead of contacting the internet?
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