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This article mainly shows you "how to upload and download multimedia files in the development of Wechat public platform". The content is simple and clear. I hope it can help you solve your doubts. Now let the editor lead you to study and learn the article "how to upload and download multimedia files in the development of Wechat public platform".

I. upload multimedia files

The official account can call this API to upload pictures, voice, videos and other files to the Wechat server. After uploading, the server will return the corresponding media_id, and the official account can then obtain multimedia according to the media_id. Note that media_id is reusable and the http protocol is required to call this interface.

Usually, the file is uploaded through the html form, but through CURL, the POST submission of the form can be made directly on the server side without going through the browser to complete the file upload function.

It should be noted that the file name must be a complete absolute path, and the absolute path must be preceded by "@" to indicate the distinction.

On the Windows server, the format example is "@ F:\ israel\ upload\ winter.jpg", while on the Linux server, the format example is: "@ home/israel/upload/winter.jpg".

Http request method: POST/FORM

Http://file.api.weixin.qq.com/cgi-bin/media/upload?access_token=ACCESS_TOKEN&type=TYPE

Parameter description

Parameters.

Is it necessary

Description

Access_token

Yes

Calling interface credential

Type

Yes

Media file types, including picture (image), voice (voice), video (video) and thumbnail (thumb)

Media

Yes

Media file identification in form-data, such as filename, filelength, content-type, etc.

Upload pictures

Return the result

{"type": "image", "media_id": "QQ9nj-7ctrqA8t3WKU3dQN24IuFV_516MfZRZNnQ0c-BFVkk66jUkPXF49QE9L1l", "created_at": 1389793969}

Upload voice

Return the result

{"type": "voice", "media_id": "5Idx79V9E3XfBCz_A50gr1a1_klgPpJnb_eq73yz0bn-prhIsNlwI3n6jQgshmWk", "created_at": 1389794760}

Upload video

Return the result

{"type": "video", "media_id": "Jm-Wq0nXtA_oN1qNydQRP03dCsB0R2t5gCHDM3QNkBmMRE1WBaorVJNQTBRHvK9-", "created_at": 1389794768}

Upload thumbnails

Return the result

{"type": "thumb", "thumb_media_id": "2RhP0caRKHVOmZO5AKelHkK--vqPPwgUaRp5-WE63dvmmPRWiYVKgvNblIp_gv79", "created_at": 1389794771}

Parameter description

Parameters.

Description

Type

Media file types, including picture (image), voice (voice), video (video) and thumbnail (thumb, mainly used for video and music format thumbnails)

Media_id

After the media file is uploaded, the unique identification when it is obtained

Created_at

Media file upload timestamp

Matters needing attention

Uploaded multimedia files are limited in format and size, as follows:

Picture (image): 128K, which supports JPG format

Voice chat (voice): 256k, playback length is less than 60s, and AMR\ MP3 format is supported.

Video (video): 1MB, which supports MP4 format

Thumbnails (thumb): 64KB, which supports JPG format

The media file is saved in the background for 3 days, that is, the media_id expires after 3 days. For multimedia files that need to be reused, you can upload them in a cycle every 3 days and update the media_id.

Download multimedia files

The official account can call this API to obtain multimedia files. Please note that downloading of video files is not supported. Http protocol is required to call this API.

The download file uses the method of obtaining picture data and writing to a new file.

Http request method: GET

Http://file.api.weixin.qq.com/cgi-bin/media/get?access_token=ACCESS_TOKEN&media_id=MEDIA_ID

Parameter description

Parameters.

Is it necessary

Description

Access_token

Yes

Calling interface credential

Media_id

Yes

Media file ID

Download pictures

Code implementation

An example of returning HTTP headers is as follows

{"url": "http://file.api.weixin.qq.com/cgi-bin/media/get?access_token=My4oqLEyFVrgFF-XOZagdvbTt9XywYjGwMg_GxkPwql7-f0BpnvXFCOKBUyAf0agmZfMChW5ECSyTAgAoaoU2WMyj7aVHmB17ce4HzLRZ3XFTbm2vpKt_9gYA29xrwIKpnvH-BYmNFSddt7re5ZrIg&media_id=QQ9nj-7ctrqA8t3WKU3dQN24IuFV_516MfZRZNnQ0c-BFVkk66jUkPXF49QE9L1l"," content_type ":" image/jpeg "," http_code ": 200,308" header_size "," request_size ": 316," filetime ":-1," ssl_verify_result ": 0 "redirect_count": 0, "total_time": 1.36, "namelookup_time": 1.016, "connect_time": 1.078, "pretransfer_time": 1.078, "size_upload": 0, "size_download": 105542, "speed_download": 77604, "speed_upload": 0, "download_content_length": 105542, "upload_content_length": 0 "starttransfer_time": 1.141, "redirect_time": 0}

Download voice

Code implementation

The HTTP header is returned as follows

{"url": "http://file.api.weixin.qq.com/cgi-bin/media/get?access_token=My4oqLEyFVrgFF-XOZagdvbTt9XywYjGwMg_GxkPwql7-f0BpnvXFCOKBUyAf0agmZfMChW5ECSyTAgAoaoU2WMyj7aVHmB17ce4HzLRZ3XFTbm2vpKt_9gYA29xrwIKpnvH-BYmNFSddt7re5ZrIg&media_id=5Idx79V9E3XfBCz_A50gr1a1_klgPpJnb_eq73yz0bn-prhIsNlwI3n6jQgshmWk"," content_type ":" audio/amr "," http_code ": 200,306" header_size "," request_size ": 316," filetime ":-1," ssl_verify_result ": 0 "redirect_count": 0, "total_time": 0.125, "namelookup_time": 0.031, "connect_time": 0.063, "pretransfer_time": 0.063, "size_upload": 0, "size_download": 10470, "speed_download": 83760, "speed_upload": 0, "download_content_length": 10470, "upload_content_length": 0 "starttransfer_time": 0.125, "redirect_time": 0}

It can be seen that the voice format of MP3 has been compressed into AMR format.

Download thumbnails

Implementation code

The HTTP header is returned as follows

{"url": "http://file.api.weixin.qq.com/cgi-bin/media/get?access_token=My4oqLEyFVrgFF-XOZagdvbTt9XywYjGwMg_GxkPwql7-f0BpnvXFCOKBUyAf0agmZfMChW5ECSyTAgAoaoU2WMyj7aVHmB17ce4HzLRZ3XFTbm2vpKt_9gYA29xrwIKpnvH-BYmNFSddt7re5ZrIg&media_id=2RhP0caRKHVOmZO5AKelHkK--vqPPwgUaRp5-WE63dvmmPRWiYVKgvNblIp_gv79"," content_type ":" image/jpeg "," http_code ": 200,306" header_size "," request_size ": 316," filetime ":-1," ssl_verify_result ": 0 "redirect_count": 0, "total_time": 0.094, "namelookup_time": 0, "connect_time": 0.047, "pretransfer_time": 0.047, "size_upload": 0, "size_download": 6057, "speed_download": 64436, "speed_upload": 0, "download_content_length": 6057, "upload_content_length": 0, "starttransfer_time": 0.094 "redirect_time": 0}

As for replying to the corresponding message, the message interface or customer service interface is used to construct the corresponding message, which is the same as the method of constructing text, picture and text messages.

The above is all the contents of the article "how to upload and download multimedia files in the development of Wechat public platform". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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