mirror of
https://github.com/pierre42100/ComunicWeb
synced 2024-11-23 04:29:21 +00:00
106 lines
3.1 KiB
JavaScript
106 lines
3.1 KiB
JavaScript
/**
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* Network functions
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*
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* @author Pierre HUBERT
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*/
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ComunicWeb.common.network = {
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/**
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* @var {object} Cache contener
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*/
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cache: {},
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/**
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* Make a GET request
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*
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* @param {String} url Destination URL
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* @param {Boolean} cacheResponse Specify if data can be cached or not (optimize network)
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* @param {function} GETnextAction What to do next
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* @return {Boolean} False if it fails
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*/
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getRequest: function(url, cacheResponse, GETnextAction){
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//First, check if it is required to cache the request
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if(cacheResponse){
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//Prepare cache entry name
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var cacheEntryName = encodeURIComponent(url);
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//Check if entry exists
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if(this.cache[cacheEntryName]){
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//Call next action with the url contained into the cache
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GETnextAction(this.cache[cacheEntryName]);
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//Quit function
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return true;
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}
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}
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//No cache entry where found or cache is disabled, continue
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var xhrRequest = new XMLHttpRequest();
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xhrRequest.open("GET", url);
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xhrRequest.onreadystatechange = function(){
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if(xhrRequest.readyState == 4){
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//We check if it is an error
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if(xhrRequest.status != 200){
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//It's an error, we will quit soon, but debug message before
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ComunicWeb.debug.logMessage("GET request failed on " + url + " Got response code " + xhrRequest.status);
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return false;
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}
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//Check if it is required to cache result
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if(cacheResponse){
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ComunicWeb.common.network.cache[cacheEntryName] = xhrRequest.responseText;
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}
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ComunicWeb.debug.logMessage("GET request: " + url + " Success (" + xhrRequest.status + ")");
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//Call next action
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GETnextAction(xhrRequest.responseText);
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}
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}
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//Perform request
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xhrRequest.send(null);
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},
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/**
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* Update the status of the network
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*
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* @param {Boolean} success True for a successful request, false else
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* @return {Boolean} True for a success
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*/
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setStatus: function(success){
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//If the request is the success, hide error message
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if(success){
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//Check if an error message was present on the screen
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if(byId("networkErrorMessage")){
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//Hide it
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byId("networkErrorMessage").style.display = "none";
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}
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}
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//If we encountered a network error, display an error message
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if(!success){
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//Log state
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ComunicWeb.debug.logMessage("NETWORK ERROR : It's seems a network request has just echoed... Please check the network !");
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//Check if error message exists or not
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if(!byId("networkErrorMessage")){
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//Create error message contener
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var networkErrorMessage = createElem("div", document.body);
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networkErrorMessage.id = "networkErrorMessage";
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//Create a callout element within it
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var errorName = "<i class='fa fa-warning'></i> "+"Network error";
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var errorMessage = "It seems that there is a network error, and Comunic can't access to the Internet anymore... Please check your internet connexion...";
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var errorCallout = ComunicWeb.common.messages.createCalloutElem(errorName, errorMessage, "danger");
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networkErrorMessage.appendChild(errorCallout)
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}
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//Make sure the error message is visible on the screen
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byId("networkErrorMessage").style.display = "block";
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}
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}
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}; |