httpurlconnection

问题 I'm trying to obtain the size of a file before I download it. I use conn.getContentLength(); to do this and it works fine on my home computers Android 2.1 Emulator. It however doesn't work once I run my app from my phone (either WiFi or 3G) and it also doesn't work when I run it from my work laptops Android 2.1 Emulator. Does anyone know a workaround for this? Is there another way I can obtain the size of the file maybe without using HttpURLConnection . 回答1: This information will not always

问题 its NOT DUPLICATE.Link that has been provided is an OLD one."http client" has been removed in api23 I want to send json object: {"emailId":"ashish.bhatt@mobimedia.in","address":"Naya bans","city":"Noida","pincode":"201301","account_number":"91123546374208","bank_name":"Axis Bank","branch_name":"91123546374208","ifsc_code":"UTI0000879"} to url: http://10digimr.mobimedia.in/api/mobile_retailer/update_profile How do i do it? via post method? METHOD: POST /api/mobile_retailer/update_profile

问题 I seem to be having trouble with some tcp requests getting "stuck" at times, like it is waiting for some response but the connection has been "severed" so a response will never come. Is this expected behavior for HttpURLConnection with default timeouts? Are there sensible defaults set so that I can't get into this odd "hung" situation by default? 回答1: Appears the "default" timeouts for HttpURLConnection are zero which means "no timeout." Unfortunately, in my experience, it appears using these

问题 In order to upload a binary file to an URL, I have been advised to use this guide. However, the file is not in a directory, but is stored in a BLOB field in MySql db. The BLOB field is mapped as a byte[] property in JPA: byte[] binaryFile; I have slightly modified the code taken from the guide, in this way: HttpURLConnection connection = (HttpURLConnection ) new URL(url).openConnection(); // set some connection properties OutputStream output = connection.getOutputStream(); PrintWriter writer

问题 I am trying to send an image to the server using HttpUrlConnection, because it's recommended by Google. I decided to convert the image into Base64 string and send it to the server where I decoded it into .jpg file. But this method is only feasible with small-sized thumbnails and I cannot send a full-sized images. Here is the android client code: public static void postData(Bitmap imageToSend) { try { URL url = new URL("http://"); HttpURLConnection conn = (HttpURLConnection) url.openConnection

问题 My code is like the following: URL url = new URL("1.0.0.25/otfg/services"); HttpURLConnection cnx = url.openConnection(); cnx.setRequestProperty("Host", "example.org"); But when I log the outgoing packages with tcpdump the http-header "Host" is 1.0.0.25. Could it be that the http-header "Host" is overwritten at a later stage of the sending process, if yes how can I avoid this behavior. 回答1: Duplicate question. The last comment solved my problem: System.setProperty("sun.net.http

问题 We have a Webstart client that communicates to the server by sending serialized objects over HTTPS using java.net.HttpsURLConnection . Everything works perfectly fine on my local machine and on test servers located in our office, but I'm experiencing a very, very strange issue which is only occurring on our production and staging servers (and sporadically at that). The main difference I know of between those servers and the ones in our office is that they are located elsewhere and client

问题 After many tries I Solved it, there is the code i use to send parameters and image : public class PurchaseAsync extends AsyncTask<String, Void, Boolean> { public static final String TAG = PurchaseAsync.class.getSimpleName(); public PurchaseAsync(ArrayList<CustomItem> parameters, String imageAddress, PurchaseListener listener){ this.parameters = parameters; this.imageAddress = imageAddress; this.listener = listener; if(this.parameters == null){ this.parameters = new ArrayList<>(); } LTH.dLog

问题 Im trying to POST a file to an API of mine along with other parameters. Eg. POST /media with the parameters filename = 'test.png' file = -the-actual-file- I can do this successfully with Postman (using form-data), so the api side of things are fine. Here is my android code using HttpURLConnection: nameValuePairs.add(new BasicNameValuePair("filename", "test.png")); URL object = new URL(url); HttpURLConnection connection = (HttpURLConnection) object.openConnection(); connection.setReadTimeout

问题 as the question allready says, I am trying to do digest authentication in android. Until now i have used the DefaultHttpClient and it's authentication method (using UsernamePasswordCredentials and so on), but it is deprecated since Android 5 and will be removed in Android 6. So i am about to switch from DefaultHttpClient to HttpUrlConnection . Now i am trying to achieve digest authentication, which should work pretty simple as explained here: Authenticator.setDefault(new Authenticator() {