connection

问题 I have written some code in PHP that returns the html content from .edu domains. A brief introduction is given here: Errors regarding Web Crawler in PHP The crawler works fine when the number of links to crawl are small (something around 40 URLS) but I am getting "MySQL server has gone away" error after this number. I am storing html content as longtext in MySQL tables and I am not getting why the error arrives after at least 40-50 insertions. Any help in this regard is highly appreciated.

问题 I need to test app for work with slow internet connection. How to simulate slow internet connection on Android emulator? 回答1: For Android Studio projects you can do the following: If you need to change net speed temporarily, then on an emulator toolbar, click three dots (settings), go to Cellular tab and configure the network speed there. You need to have a recent Android Tools. If you want to set this speed permanently for some emulator image: Open menu Tools -> Android -> AVD Manager Select

问题 In my application, which I test on emulator, I use the following code to check the network connection (WIFI): public boolean isOnline() { ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo netInfo = cm.getActiveNetworkInfo(); if (netInfo != null && netInfo.isConnectedOrConnecting()) { return true; } return false; } This method returns always true , even if I disable the wireless connection of my computer... Is this caused by the emulator

问题 In my application, which I test on emulator, I use the following code to check the network connection (WIFI): public boolean isOnline() { ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo netInfo = cm.getActiveNetworkInfo(); if (netInfo != null && netInfo.isConnectedOrConnecting()) { return true; } return false; } This method returns always true , even if I disable the wireless connection of my computer... Is this caused by the emulator

问题 I have a project in which i have to connect with user specified database. I want to implement it in a proper codeigniter's style but i dont know how can i do that codeigniter stores database credentials in a database.php file is there any way to make it dynamic. Or is there any other approach for achieving this? I have googled it but did not find anything helpful. Any help and suggestion would be appreciated. UPDATE: The project is about reporting. I have a form in which i got the database

问题 I have developed a client-server connection by using socket.io , and i'm happy to say that it works perfectly. The problem comes because I need to create that connection from php Source ( not "echo html javascript" ). Something Like a $socket = socket.createConectionJS; I've tried difrerent ways, such as : execute the code from the server ( with spiderMonkey, and node ) creating a phpSocket and connecting it to the ServerSocket.j( but obbiously the format is diferent). or ... Finally i've

问题 A follow up to this question: How can I download and uncompress a gzipped file using R? For example (from the UCI Machine Learning Repository), I have a file of insurance data. How can I download it using R? Here is the data url: http://archive.ics.uci.edu/ml/databases/tic/tic.tar.gz . 回答1: I like Ramnath's approach, but I would use temp files like so: tmpdir <- tempdir() url <- 'http://archive.ics.uci.edu/ml/databases/tic/tic.tar.gz' file <- basename(url) download.file(url, file) untar(file,

问题 This question already has answers here : How to check my internet access on Android? (5 answers) Closed 6 years ago . Hello I have application based on data retrieved over internet... How can I handle my app in case there is no connection available? I can detect connection with ConnectivityManager cm = (ConnectivityManager) getSystemService(this.CONNECTIVITY_SERVICE); return cm.getActiveNetworkInfo().isConnectedOrConnecting(); It works fine... But how can I prevent Force Erros when I know

问题 I'm building a website with MySQL. I'm using TOAD for MySQL and suddenly I can't connect to the database as I'm getting an error: "Too many connections" Is there any way in Toad for MySQL to view existing connections to be able to kill them or simple close all connections all together? 回答1: No, there is no built-in MySQL command for that. There are various tools and scripts that support it, you can kill some connections manually or restart the server (but that will be slower). Use SHOW

问题 I want to use HTTP GET and POST commands to retrieve URLs from a website and parse the HTML. How do I do this? 回答1: You can use HttpURLConnection in combination with URL. URL url = new URL("http://example.com"); HttpURLConnection connection = (HttpURLConnection)url.openConnection(); connection.setRequestMethod("GET"); connection.connect(); InputStream stream = connection.getInputStream(); // read the contents using an InputStreamReader 回答2: The ticked/approved answer for this is from