httpurlconnection

问题 I have a scheduled job class, implements the Quartz Job class, from which I want to invoke a Servlet class that updates a flag in a DB table and then it sends emails to an appropriate emailing list. I get a java.net.ConnectException . Though the servlet is properly invoked by either entering its URL in the browser or by JavaScript in a JSP page. My Java class is the following: public class ExpirationJob implements Job { org.apache.log4j.Logger log = org.apache.log4j.Logger.getLogger(

问题 I have a scheduled job class, implements the Quartz Job class, from which I want to invoke a Servlet class that updates a flag in a DB table and then it sends emails to an appropriate emailing list. I get a java.net.ConnectException . Though the servlet is properly invoked by either entering its URL in the browser or by JavaScript in a JSP page. My Java class is the following: public class ExpirationJob implements Job { org.apache.log4j.Logger log = org.apache.log4j.Logger.getLogger(

问题 In my project, I should download a file chunk by chunk from one server and upload each chunk immediately to another server. I have a URL of the file from where I should download. Let's call it downloadUrl . So, this is how I download file chunk by chunk: val chunkSize = 1024 * 1024 BufferedInputStream(downloadUrl.openStream()).use { bis -> val buffer = ByteArray(chunkSize) var countBytesRead: Int while (bis.read(buffer, 0, chunkSize).also { countBytesRead = it } != -1) { // I should send

问题 Right so, I started my project on creating a Java download manager which is going nicely. The only problem I am seeing at the moment is when i request the content length of the URL. When i use the method provided by HttpUrlConnection's getContentLength, it returns an Int. This is great if i was only to ever download files that were less than 2GB in file size. Doing some more digging and find that java does not support unsigned int values, but even so that would only give me a file size of a

问题 I'm trying to hit a page which contains a xml structure. for that i'm using this code @Reference private SlingRepository repository; adminSession = repository.loginAdministrative( repository.getDefaultWorkspace()); String pageUrl = "http://localhost:4504"+page+".abc.htm"; conn = (HttpURLConnection)new URL(pageUrl).openConnection(); conn.setRequestProperty("Accept-Charset", charset); conn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.3) Gecko

问题 I have changed my code version from http to https and I am using HttpClient client = HttpClientFactory.getHttpsClient() for execution purposes. When I am trying to run my code for the first time it is running fine and next time is throwing the exception java.lang.IllegalStateException: Connection pool shut down exception I am using 4.5HC. 回答1: Do not close your client after a request if you are pooling the connections. That is, you are probably doing something like this:

问题 What is the difference between sending data through the request header and sending data through the request body. Under what circumstances, we have to send the data through the header/body and when shouldn't we send the data through header/body ? 回答1: It is usually a good idea to use the headers for metadata and the body for the data that is used by the business logic. Some points to consider: 1) If the data is sent via HTTP instead of HTTPS, the proxy servers can modify the headers. 2) If

问题 This is using OpenJPA 2.4.2 in my maven project to automate build-time enhancement of the JPA entities: <plugin> <groupId>org.apache.openjpa</groupId> <artifactId>openjpa-maven-plugin</artifactId> <configuration> <includes>**/entity/*.class</includes> <addDefaultConstructor>true</addDefaultConstructor> <enforcePropertyRestrictions>true</enforcePropertyRestrictions> <persistenceXmlFile>src/main/resources/META-INF/persistence.xml</persistenceXmlFile> </configuration> <executions> <execution>

问题 I am trying to upload large video files to the server. I wrote a piece of code which works well for the image so I thought I should work it for the video too. I wrote the below code. public int uploadFile(String sourceFileUri) { String fileName = sourceFileUri; //Log.v("ONMESSAGE", "File type is " + filetype + "File name is " + fileName); HttpURLConnection conn = null; DataOutputStream dos = null; String lineEnd = "\r\n"; String twoHyphens = "--"; String boundary = "*****"; int bytesRead,

问题 I'm upgrading an app to API 23 where org.apache.http is deprecated. My current (deprecated) code looks like this: HttpClient httpClient = new DefaultHttpClient(); File file = new File(attr.Value); String url = server_url; HttpPost request = new HttpPost(url); FileEntity fileEntity = new FileEntity(file, "image/png"); request.setEntity(fileEntity); HttpResponse response = httpClient.execute(request); String output = getContent(response.getEntity().getContent()); I've found some suggestions to