I am trying to send a video to a videosite, I am able to upload the video using the REST api and postman, so I know the api works as intended. Now I want to do exatcly the same request using axios. I have code that looks like the example on how to use form-data and axios:
const form = new FormData();
const stream = fs.createReadStream(PATH_TO_FILE);
form.append('image', stream);
// In Node.js environment you need to set boundary in the header field 'Content-Type' by calling method `getHeaders`
const formHeaders = form.getHeaders();
axios.post('http://example.com', form, {
headers: {
...formHeaders,
},
})
.then(response => response)
.catch(error => error)
I get the error that data: 'Content-Length is required'
Any ideas?
May be I got your questions wrong , you want to add Content-Length in the header.
I can see you are uploading video stream. So first you have to calculate the data chunk length.
('Content-Length', File.getSize(stream))
Reference: Can I stream a file upload to S3 without a content-length header?
You can make the post request as multi-part type : 'Content-Type': 'multipart/form-data'.
It is preferable way to send large data to server.
You can check this link : How do I set multipart in axios with react?
If I got your question wrong , plese comment or reply . Thanks
The solution to my problem was to set Content-Length accordingly:
"Content-Length": fs.statSync(filePath)['size']
I think the best way to handle this is to actually use the FormData's own method:
const headers = { 'content-length': formData.getLengthSync(), ...formData.getHeaders() }
This will be more accurate because it includes any other data you may add.
To expound, if you are using a ReadStream, you must use the async function instead.
const { promisify } = require('util')
const getLength = promisify(formData.getLength.bind(formData))
const contentLength = await getLength()
const headers = { 'content-length': contentLength, ...formData.getHeaders() }
Related
I have a Vue.js app which uses axios to interact with a Laravel API. I'm trying to make a POST request with an image file in it to upload in the backend.
The issue I'm having is that axios makes the POST request with empty payload.
I've tried sending it both as a plain JS object and with FormData. In both cases the request payload is empty. I've looked on the internet for hours but I was unable to find anything while trying to tackle the issue in the past few days...
This is how I make the request:
let fd = new FormData();
fd.append('file', this.file);
console.log(...fd) //shows the file is there with its data
axios
.post("/api/images", fd)
.then(response => {
//Handle success
})
.catch(errors => {
//Catch errors
});
This is how I get the file from the form:
let selectedImage = this.$refs.fileInput.files[0];
const reader = new FileReader();
reader.addEventListener('load', (event) => {
this.file = event.target.result;
});
reader.readAsDataURL(selectedImage);
I've tried experimenting with the request headers and at the moment they are as follows:
"Accept" : "application/json",
"Content-Type": "multipart/form-data; charset=utf-8; boundary=" + Math.random().toString().substr(2),
"Authorization": "Bearer " + this.user.api_token,
"X-CSRF-TOKEN": document.querySelector('meta[name="csrf-token"]').content
The responses from Laravel are always that the file is required (as expected when it's indeed missing).
I did try encoding the file in Base64 but I have trouble validating that it's an image in the backend.
I found this similar question but it wasn't of any help: FormData sends empty data using axios
I want to send a file + JSON data but I'm ok with just making the file upload work. So... How do I send a file from Vue.js app to Laravel API using Axios? What am I doing wrong?
I am trying to using Axios PUT function to upload an image to Azure Storage.
What I did is as following:
I created a storage account in Azure, then I Add CORS rule as following: CORS rule
I created a Blob with name user-pic.
I use Axios to make the request for me
code:
function upload(formData) {
//get the current date
var currentdate = new Date();
var Curr_date = currentdate.getDay + '-' + currentdate.getMonth + '-' + currentdate.getFullYear;
//Here I am trying to convert the image to binary encoding.
var data = btoa(formData);
//The image Url, [ below there is an example from where I take this url ].
const url = "https://XXXXXXX.blob.core.windows.net/XXXXXXXXXXXX";
//Headers are required for me, do I need to add all Headers in my code also in CORS of the storage account?
axios.put(url, data {
headers: {
"Access-Control-Allow-Origin" : "*",
'Access-Control-Allow-Methods': 'GET, POST, PATCH, PUT, DELETE, OPTIONS',
"Access-Control-Allow-Headers": "Origin, Content-Type, x-ms-*",
"Content-Type": "image/png",
"Content-Length": data.length, //here I am trying to get the size of image.
"x-ms-date": Curr_date,
"x-ms-version": sv,
"x-ms-blob-type": "BlockBlob",
}
})
.then ( response => { console.log(response); console.log('correct!!'); } )
.catch ( error => { console.log(error); console.log('error here!!'); });
}
What I mean by the comments inside the code:
The image URL should be at the same format of this: Blob SAS Url
Is the format of Curr_date is correct to be accepted by x-ms-date header?
Is function btoa used to convert the image to binary encoding?
Should I add all headers in Axios into account storage CORS (in the header field)?
What is the correct method to get the size of the image? (.size function? actually, I am passing the formData after appending all images into it.
After running the program, in the console, I got two error messages:
How can I solve these problems?
Update:
I made these changes:
I change the CORS: CORS
I got this error msg: Error Msg
Your CORS rule defined for your Azure Storage is missing your http://localhost origin.
I am trying to upload file using React Dropzone on ftp with Reactjs + AXIOS at front end, Nodejs + connect-multiparty at back end.
The problem is when I am sending file via front end using AXIOS, I am not getting the file at server in request.
My code to upload file using react-axios is
let data = new FormData()
data.append('file', file)
var setting = {
method: 'post',
url: 'my-server-url',
data:data,
headers: {
'Content-Type': 'multipart/form-data'
},
}
var response = axios(setting).then(response => { return response.data })
.catch(response => response = {
success: 500,
message: "Your submission could not be completed. Please Try Again!",
data: ""
});
while using postman, everything works fine. Server side api is working. only problem with client side request code.
Any help!!!
This is a very rookie mistake you're making probably because of the fact that you don't understand the way multipart works. For your client-side code to work, i.e form-data to be sent back to the backend, you need to:
Either remove the header and let the browser choose the header for you based on your data type
Or when using 'Content-Type': 'multipart/form-data', add a boundary to it
Multipart boundary looks like this,
'Content-Type': 'multipart/form-data; boundary=----WebKitFormBoundaryABCDEFGHIJKLMNOPQRSTUVWXYZ'
Simply doing the following will solve the issue for you as the browser will take care of the headers needed.
axios.post('your-server-url', data).then(....)
I'm new to this framework, can anyone tell me how to upload an image with other fields in a form to the server using POST?
Currently, I know how to send value from the fields using POST, but without image.
let headers = new Headers({
'Content-Type' : 'application/json'
});
let options = new RequestOptions({ headers: headers });
let data = JSON.stringify({
username: username, password: password
});
return this.http.post(this.baseUrl+"/login/auth", data, options)
.map(res => res.json())
.toPromise()
.catch((error) => {
console.log("Login failed");
return Promise.reject(error);
});
You should use fileTransfer for uploading files, you can send additional data in its options which you can access on your backend.
Other way to do it with http POST is to send base64 data of image , and regenerate it on your backend and save it to location. But that is nonsense , since your post url will be huge, sometimes wont even be able to send it whole.
I would recommend you reading about fileTransfers.
I am using Angularjs and nodejs in the project and working on file uploads. I want to send the post request to the url endpoint in a secure way as I need to attach accesstoken with the request. So the way I did this was, I added the directive to choose the file from UI and once it gets the file, I append it using FormData() like this in the controller
var fd = new FormData();
fd.append('file',myFile);
and sending this formdata object to the nodejs server like mentioned here http://uncorkedstudios.com/blog/multipartformdata-file-upload-with-angularjs
expect this request will be going to my nodejs server url from there I will be making another post request to external web service
$http.post('api/collections/upload',fd, {
transformRequest: angular.identity,
headers: {
'Content-type': undefined
}
});
So it will attach the right content-type and boundaries in the request. I am getting the file on server side nodejs when I do
function(req,res){
console.log(req.files); //I am able to see the file content
}
It is uploaded on the nodejs server side.
Now I want to make a post request using the req.files to a different endpoint along with proper accessToken and headers. Tried many things but not able to make the request go thru. Not sure how can I attach the imagedata/ req.files along with the request. I tried these two things mentioned in request npm module https://www.npmjs.org/package/request
1)
request.post({
url: 'https://www.example.com/uploadImage',
headers: {
'Authorization': <accessToken>,
'Content-type': 'multipart/form-data'
},
body: req.files
});
Don't know how can I attach and binary data with this request and how can I put boundary. Is boundary needed when you want to send the uploaded image with this request?
2)
fs.createReadStream(req.files.file.path, {encoding: base64}).pipe(request.post({
url: 'https://www.example.com/uploadImage',
headers: {
'Content-type': 'multipart/form-data'
}
}));
Can someone please suggest some ideas on how can I send this post request using request npm module? Thanks.
Documentation here has lots of examples of doing exactly what you describe:
https://github.com/mikeal/request#streaming
As can be seen in that link, the request library adds a .pipe() method to your http's req object, which you should be able to use like the examples in the link:
function(req, res) {
req.pipe(request.post('https://www.example.com/uploadImage');
}
Or something similar.
You were nearly there with your #2 try, but that would only work if you have previously written the file out to disk and were reading it in with fs.createReadStream()
your suggestion helped me to atleast know what I was trying was right. Another article that solved my problem was this http://aguacatelang.wordpress.com/2013/01/05/post-photo-from-node-js-to-facebook/ .Basically, here is what I did and it worked. Thanks for your suggestion.
var form = new FormData();
form.append('file', fs.createReadStream(__dirname + '/image.jpg'));
var options = {
url: 'https://www.example.com/uploadImage?access_token='+ <accesstoken>,
headers: form.getHeaders()
};
form.pipe(request.post(options,function(err,res){
if(err){
log.debug(err);
}
else {
log.debug(res);
}
}));