獲取二維碼ticket後,開發者可以用ticket換取二維碼圖片。該操作無須登錄或授權即可調用。
換取二維碼的請求接口如下(注意Ticket需UrlEncode)。
https:// mp.weixin.qq.com/cgi-bin/showqrcode?ticket=TICKET
ticket正確的情況下,HTTP返回碼是200,是一張圖片,可以直接展示或者下載。
上述接口運行後,返回的HTTP頭示例如下。其中,url即二維碼的圖片地址。
{ "url": "https:// mp.weixin.qq.com/cgi-bin/showqrcode?ticket=gQHi8DoAAAAAAAAAASxod HRwOi8vd2VpeGluLnFxLmNvbS9xL0UweTNxNi1sdlA3RklyRnNKbUFvAAIELdnUUgMEAAAAAA%3D%3D", "content_type": "image/jpg", "http_code": 200, "header_size": 162, "request_size": 181, "filetime": -1, "ssl_verify_result": 20, "redirect_count": 0, "total_time": 0.509, "namelookup_time": 0, "connect_time": 0.058, "pretransfer_time": 0.343, "size_upload": 0, "size_download": 28497, "speed_download": 55986, "speed_upload": 0, "download_content_length": 28497, "upload_content_length": 0, "starttransfer_time": 0.481, "redirect_time": 0 }
下面分別是兩種場景二維碼的URL。
https:// mp.weixin.qq.com/cgi-bin/showqrcode?ticket=gQFK8DoAAAAAAAAAASxodHRwOi8vd2VpeGluLnFxLmNvbS9xL3kweXE0T3JscWY3UTltc3ZPMklvAAIEG9jUUgMECAcAAA%3d%3d https:// mp.weixin.qq.com/cgi-bin/showqrcode?ticket=gQHi8DoAAAAAAAAAASxodHRwOi8vd2VpeGluLnFxLmNvbS9xL0UweTNxNi1sdlA3RklyRnNKbUFvAAIELdnUUgMEAAAAAA%3d%3d
上述URL代碼的二維碼圖片如圖8-2所示。
圖8-2 臨時二維碼和永久二維碼