If the picture is uploaded by egg, it is converted to buffer format.

upload an image from the front end, and at the back end, get the following temporary path:

/ var/folders/5y/3cm_1kws4r18wmx5n2l9ntzm0000gn/T/egg-multipart-tmp/multipart-file-mode-example/2018/10/29/14/5eb8f5b7-a1d5-4b6a-9cf0-4fcc80bab4f0.png

I want to send this image into sharp for compression and other processing, but this path sent an error in sharp,: the input file has a corrupted header, so can I transfer this temporary path to buffer format? If possible, if you convert this path to buffer format? I hope you can give me some advice.

Eggjs node.js javascript

Mar.16,2022

the stream passed from the front end is converted into buffer, and then a sharp object is instantiated with this buffer, and the server is saved by toFile (target path) after a series of operations.
stream to buffer use the following function

const streamToBuffer = stream => {
  return new Promise((resolve, reject) => {
    const buffers = [];
    stream.on('error', reject);
    stream.on('data', data => buffers.push(data));
    stream.on('end', () => resolve(Buffer.concat(buffers)));
  });
};

then call and instantiate sharp such as:

// stream  buffers
const buf = await streamToBuffer(stream);
// sharp
const originImg = sharp(buf);

Previous: Mini Program's problem of getting openid

Next: Laravel-mix displays this.setDynamic is not a function error

When useSession is enabled in eggjs,csrf configuration, the ajax request reports an error of 403.
eggjs framework. When useSession is enabled in csrf configuration, ajax requests to report a 403 error. How to solve this problem? if useSession is not enabled, simply add x-csrf-token to the ajax request header, and the csrftoken value is taken from...

Eggjs node.js javascript

Mar.21,2021
Eggjs has one request and executed many interface functions
an online lottery item (eggjs+mysql) that occasionally has duplicate data in the database. I looked at the request log and found that two of the same requests were printed twice, resulting in two requests for interface functions. I don t know if it is c...

Eggjs node.js javascript

Apr.01,2021
Upload pictures at the front end. In egg, how do you get the original path of uploading pictures?
after reading the official tutorials and examples of egg, all you can get is the processed path. If the path is passed into sharp, it will report an error and cannot be compressed. Is there any way to get the original path of uploading pictures? relat...

Eggjs node.js javascript

Sep.24,2021
How to close the process pop-up window after eggjs start under windows?
problem description use eggjs to build a website backend service. uses eggjs scaffolding egg-init to quickly build a frame. when started with npm start under windows, a lot of pop-up boxes will appear. related codes the specific start configur...

Eggjs node.js javascript

Jan.19,2022

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e360b7-43b12.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e360b7-43b12.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?