# wxacode.createQRCode

Call this API at the server side. For more information, see Server API.

This API supports Cloud Calls. The WeChat DevTools version must be 1.02.1904090 or later (download the latest stable version here), and the wx-server-sdk version must be 0.4.0 or later.

Obtains Mini Program QR code in scenarios where a small number of codes are required. Mini Program codes generated via this API are permanently effective, but the quantity is limited. For details, see Obtaining the QR Code.

Calling methods:

HTTPS call
Cloud call

# HTTPS Call

# Request Address

POST https://api.weixin.qq.com/cgi-bin/wxaapp/createwxaqrcode?access_token=ACCESS_TOKEN

# Request Parameters

Attribute	Type	Default	Required	Description
access_token	string		Yes	Credentials to call API
path	string		Yes	The path to the Mini Program page to be entered after QR code is scanned. Its value cannot be empty and contains a maximum of 128 bytes. For a Mini Game, you may pass in only the query part. For example, after ?foo=bar is passed in, you can obtain `{foo:"bar"}` from the query parameter via the `wx.getLaunchOptionsSync` API.
width	number	430	No	The width of the QR code (in px). The minimum value is 280 px and the maximum value is 1280 px.

# Return Value

# Buffer

An image buffer is returned.

# Exception Response

# Object

JSON

Property	Type	Description
errcode	number	Error code
errmsg	string	Error message

Valid values of errcode

Value	Description	Minimum Version
45029	The total number of generated codes has reached the upper limit.

# Return Values

If the call is successful, binary content of the image is directly returned; if the call failed, data in the JSON format is returned.

# Notes

POST parameters need to be converted into JSON strings, and cannot be submitted in forms.
This API can only be used to generate the QR codes for published Mini Programs. The QR code containing parameters for a Mini Program in the developer version can be generated via WeChat DevTools during preview.
The maximum number of codes generated via wxacode.get and this API is 100,000, so be cautious when using this API.

# Example

Request

{
 "path":"page/index/index",
 "width":430
}

Response

{
 "errcode": 0,
 "errmsg": "ok",
 "contentType": "image/jpeg",
 "buffer": Buffer
}

# Cloud Call

Cloud call is a capability provided by Mini Program·Cloud Base that allows you to call WeChat APIs in a cloud function. It must be used via wx-server-sdk in the cloud function.

# API Calling Method

openapi.wxacode.createQRCode

You need to configure the permissions for the wxacode.createQRCode API via config.json. Details

# Request Parameters

Attribute	Type	Default	Required	Description
path	string		Yes	The path to the Mini Program page to be entered after QR code is scanned. Its value cannot be empty and contains a maximum of 128 bytes. For a Mini Game, you may pass in only the query part. For example, after ?foo=bar is passed in, you can obtain `{foo:"bar"}` from the query parameter via the `wx.getLaunchOptionsSync` API.
width	number	430	No	The width of the QR code (in px). The minimum value is 280 px and the maximum value is 1280 px.

# Return Value

# Object

Returns an object containing binary data and its data type.

Property	Type	Description
contentType	String	Data type (MIME Type)
buffer	Buffer	Data buffer

# Exceptions

# Object

JSON

Property	Type	Description
errCode	number	Error code
errMsg	string	Error message

Valid values of errCode

Value	Description	Minimum Version

# Example

Request

const cloud = require('wx-server-sdk')
  cloud.init()
  exports.main = async (event, context) => {
    try {
      const result = await cloud.openapi.wxacode.createQRCode({
        path: 'page/index/index',
        width: 430
      })
      console.log(result)
      return result
    } catch (err) {
      console.log(err)
      return err
    }
  }

Response

{
 "errcode": 0,
 "errmsg": "ok",
 "contentType": "image/jpeg",
 "buffer": Buffer
}