Cocos2d-x 3.2 Lua demo example xmlhttprequesttest (HTTP network request)

Cocos2d-x 3.2 Lua demo example xmlhttprequesttest (HTTP network request)

This blog introduces xmlhttprequesttest in the demo of Cocos2d-x 3.2lua, which provides two HTTP request methods: Get and post. The returned data types are as follows: Cc. xmlhttprequest_response_string = 0 -- returns the string type.
Cc. xmlhttprequest_response_array_buffer = 1 -- returns the byte array type.
Cc. xmlhttprequest_response_blob = 2 -- returns the Binary large object type.
Cc. xmlhttprequest_response_document = 3 -- type of the returned Document Object
Cc. xmlhttprequest_response_json = 4 -- return the JSON data type.

The definitions of these constants can be found in cocos2dconstants. Lua.

Sample Code:

-- [[========================= Xmlhttprequesttest. luahttp request =======================]] -- require ("JSON") Local function xmlhttprequestlayer () Local layer = cc. layer: Create () -- create layer Local winsize = cc. director: getinstance (): getwinsize () -- Obtain the form size local margin = 40 -- spacing local space = 35 -- width local function Init () local label = cc. label: createwithttf ("xml http request test", s_arialpath, 28) -- use the label Label: setanchorpoint (CC. P (0.5, 0.5) -- set the anchor label: setposition (CC. P (winsize. width/2, winsize. height-margin) -- sets the display position. The width is in the middle of the screen. The height is the screen height minus the Spacing Layer: addchild (Label, 0) -- add the label to the layer -- display the return code label local labelstatuscode = cc. label: createwithttf ("HTTP status code", s_markerfeltfontpath, 20) labelstatuscode: setanchorpoint (CC. P (0.5, 0.5) labelstatuscode: setposition (CC. P (winsize. width/2, winsize. height-margin-6 * space) layer: addchild (labelstatuscode) Local menurequest = cc. menu: Create () -- create menu menurequest: setposition (CC. P (0, 0) layer: addchild (menurequest) -- add menu -- get local function onmenugetclicked () Local xhr = cc. XMLHttpRequest: New () -- http request xhr. responsetype = cc. xmlhttprequest_response_string -- response type xhr: open ("get", "http://httpbin.org/get") -- open link -- call local function onreadystatechange () when the status changes () -- display status text local statusstring = "HTTP Status Code :".. xhr. statustext labelstatuscode: setstring (statusstring) print (xhr. response) end -- Note callback script callback method xhr: registerscripthandler (onreadystatechange) xhr: Send () -- send request labelstatuscode: setstring ("waiting... ") end -- else try to get the label local labelget = cc. label: createwithttf ("test get", s_arialpath, 22) labelget: setanchorpoint (CC. P (0.5, 0.5) Local itemget = cc. menuitemlabel: Create (labelget) -- menu tag itemget: registerscripttaphandler (onmenugetclicked) -- menu Click Event itemget: setposition (CC. P (winsize. width/2, winsize. height-margin-space) menurequest: addchild (itemget) -- add menu item -- post local function onmenupostclicked () Local xhr = cc. XMLHttpRequest: New () -- creates an XMLHTTPRequest object xhr. responsetype = cc. xmlhttprequest_response_string -- the corresponding type is string xhr: open ("Post", "http://httpbin.org/post") -- POST method local function onreadystatechange () labelstatuscode: setstring ("HTTP Status Code :".. xhr. statustext) print (xhr. response) end -- note the callback script method callback xhr: registerscripthandler (onreadystatechange) xhr: Send () -- send labelstatuscode: setstring ("waiting... ") end -- Future the label of the post test: Local labelpost = cc. label: createwithttf ("test post", s_arialpath, 22) labelpost: setanchorpoint (CC. P (0.5, 0.5) -- set the local itempost = cc. menuitemlabel: Create (labelpost) -- set the menu item tag itempost: registerscripttaphandler (onmenupostclicked) -- Note the callback menu item click the callback method itempost: setposition (CC. P (winsize. width/2, winsize. height-margin-2 * space) menurequest: addchild (itempost) -- Post binary local function onmenupostbinaryclicked () Local xhr = cc. XMLHttpRequest: New () -- creates an XMLHTTPRequest object xhr. responsetype = cc. xmlhttprequest_response_array_buffer -- the returned data is byte stream xhr: open ("Post", "http://httpbin.org/post") -- open socket -- call local function onreadystatechange () local response = xhr when the status changes. response -- Obtain the returned data. Local size = table. getn (response) -- get the returned data size local strinfo = "" for I = 1, size do if 0 = response [I] Then strinfo = strinfo .. "\ '\ 0 \'" else strinfo = strinfo .. string. char (response [I]) end labelstatuscode: setstring ("HTTP Status Code :".. xhr. statustext) print (strinfo) end -- note that the callback script method calls back xhr: registerscripthandler (onreadystatechange) xhr: Send () -- send labelstatuscode: setstring ("waiting... ") end -- begin try to use the post Request Method to send the byte stream local labelpostbinary = cc. label: createwithttf ("test post binary", s_arialpath, 22) labelpostbinary: setanchorpoint (CC. P (0.5, 0.5) Local itempostbinary = cc. menuitemlabel: Create (labelpostbinary) itempostbinary: registerscripttaphandler (onmenupostbinaryclicked) itempostbinary: setposition (CC. P (winsize. width/2, winsize. height-margin-3 * space) menurequest: addchild (itempostbinary) -- Post JSON local function onmenupostjsonclicked () Local xhr = cc. XMLHttpRequest: New () -- creates an XMLHTTPRequest object xhr. responsetype = cc. xmlhttprequest_response_json -- JSON data type xhr: open ("Post", "http://httpbin.org/post") -- POST method local function onreadystatechange () -- display status code, successfully display 200 labelstatuscode: setstring ("HTTP Status Code :".. xhr. statustext) local response = xhr. response -- Obtain the response data local output = JSON. decode (response, 1) -- parse JSON data table. foreach (output, function (I, V) print (I, V) End) print ("headers are") table. foreach (output. headers, print) end -- note the callback script method callback xhr: registerscripthandler (onreadystatechange) xhr: Send () -- send request labelstatuscode: setstring ("waiting... ") end -- else try to use the post method to send the JSON tag local labelpostjson = cc. label: createwithttf ("test post JSON", s_arialpath, 22) labelpostjson: setanchorpoint (CC. P (0.5, 0.5) -- The anchor local itempostjson = cc. menuitemlabel: Create (labelpostjson) -- menu item label itempostjson: registerscripttaphandler (onmenupostjsonclicked) -- click itempostjson: setposition (CC. P (winsize. width/2, winsize. height-margin-4 * space) menurequest: addchild (itempostjson) end -- node callback event local function onnodeevent (eventname) If "enter" = eventname then Init () end end -- note the callback event layer: registerscripthandler (onnodeevent) return layerendfunction xmlhttprequesttestmain () local scene = cc. scene: Create () -- create scenario scene: addchild (xmlhttprequestlayer () -- add layer scene: addchild (createbackmenuitem () -- add the return menu item to view the helper for details. lua file return sceneend

For example:
Test get:

Test post:

Test post binary:


Test post JSON:

Cocos2d-x 3.2 Lua demo example xmlhttprequesttest (HTTP network request)