WeChat Mini Program Network API Upload and Download Detailed Instructions

This article mainly introduces the WeChat mini program networkAPI Upload, download detailed instructions related information, friends in need can refer to the following

wx.uploadFile(OBJECT)

Upload local resources to the developer server. For example, after the page obtains the temporary file path of a local resource through wx.chooseImage and other interfaces, it can upload the local resource to the designated server through this interface. The client initiates an HTTPS POST request, where the Content-Type is multipart/form-data .

OBJECT parameter description:

namekeyheaderformDatasuccessCallback function for successful interface callfailcompleteSample code:

Parameter	Type	Required	Description
url	String	is the	developer server url
filePath	String	is the path to the file resource to be uploaded
String	is the	corresponding to the	file. Developers can obtain the binary content of the file through this key on the server side
Object	No	HTTP Request Header
Object	No	Other additional form data in the HTTP request
Function	No
Function	No	Callback function for interface call failure
Function	No	Callback function for interface call completion (successful call , will be executed if it fails)

wx.chooseImage({
 success:function(res){
 var tempFilePaths = res.tempFilePaths; 
 wx.uploadFile({
  url: 'http://example.com/upload',
  filePath: tempFilePaths[0],
  name:"file",
  formData:{
  "user":"test"
  }
 })
 }
})

##wx. downloadFile(OBJECT)

Download file resources to the local. The client directly initiates an HTTP GET request, processes the downloaded resource according to type, and returns the local temporary path of the file.

OBJECT parameter description:

##Parameter TypeurlStringStringObjectFunctionFunctionFunctionSample code:

Required	Required
Yes	URL for downloading resources		type
No	The type of downloading resources, used for Client identification processing, valid values: image/audio/video		header
No	HTTP request Header		success
No	After the download is successful, it will be passed to the page in the form of tempFilePath, res={tempFilePath:"File Temporary path"}		fail
No	Callback function that fails to call the interface		complete
No	The callback function at the end of the interface call (will be executed if the call is successful or failed)

wx.downloadFile({
 url: 'http://example.com/audio/123',
 type: 'audio',
 success:function(res){
 wx.playVoice({
  filePath: res.tempFilePath
 })
 }
})

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