Open the project directory, create a file using app.js cnpm init command to initialize the project file and superagent express installation and setup information saved to a package file
Installation finished
Write interface to see if there is a problem with wood
OK interfaces is possible
Next step is to dry down to business.
Config.js build a file on the same level app.js file path for saving applet appid and secret, using module.exports export
References use superagent initiate requests in app.js
The URL parameters into the request's call it in your browser
Look at the contents of print
Here access_token got to do with the access_token after stitching URL
Here baseUrl is spliced URL wait to use.
Applet parameter codes now write generation
These parameters in official documents is a small program can be found
After using superagent post initiation request URL request is spliced Previous baseUrl, it is converted into the contents of the parameter string json
Call in the browser, a print of your data back
I can see is the back buffer the data stream
To do now is to transfer this data into a picture buffer is a small program code
Under the new project images folder while introducing fs module
Write to a file using the fs module
The browser calls the pictures to see if there is generated images folder
You can see have been saved successful, open the picture look
Indeed applet code. So far nodejs generated using parameters of two-dimensional code has been achieved.
If you want to show this little program code required to back out of the picture at the front
Here with a new route, sendFile parameter path needs to be a complete path and therefore use of __dirname mosaic image path, the file is returned out
We can see already got a small program code.
Corresponding demo link:
http://note.youdao.com/noteshare?id=e814cc22778f97e4ee241a3d17766fcc