TypeError [ERR_HTTP_INVALID_HEADER_VALUE]: Invalid value "undefined" for header "Content-Length"

[Daniyal83]

Hello. When I use unirest to make a request a get an error ' Invalid value "undefined" for header "Content-Length" '. How can I prevent that? It happens from time to time, but not every time. I'm using node.js on backend for my application. Here is my function

function addTasks(object) {
    return new Promise((resolve, reject) => {
        unirest.post(`${xtmBaseUrl}/rest-api/projects`)
        .headers({"Authorization": xtmToken,
        'Content-Type': 'multipart/form-data'})  
        .field('customerId', object.customerId)
        .field('name', object.name)
        .field('sourceLanguage', object.source)
        .field('targetLanguages', object.target)
        .field('analysisTemplateId', object.templateId)
        .field(withJoinObject)
        .attach(filesObj)
        .end(response => {
            if(response.error) {
                reject(response.error)
            }
            resolve(response.body)
        })
    })
}

[AntoTG]

Hello @Daniyal83 I had the same problem, my solution was update the form-data dependency of unirest-nodejs to the last version (2.5.1) on the package.js of unirest-nodejs

[bambita]

I am facing the same error. I use "unirest": "^0.6.0" and "form-data": "^3.0.0"
Any idea?

[adishupadhyay]

Hi All ,
Any update on above mentioned issue? I am facing same problem

[adishupadhyay]

Hello @Daniyal83 I had the same problem, my solution was update the form-data dependency of unirest-nodejs to the last version (2.5.1) on the package.js of unirest-nodejs

How you updated, its internally used by unirest

[jbw09]

Still getting this error with unirest 0.6.0 and form-data 4.0.0 while trying to upload attachments in Freshdesk. Most annoying part is I can't figure out how to catch it so it keeps stopping program execution -

try {
        unirest.put(url)
        .headers(headers)
        .attach('attachments[]', fs.createReadStream('./FDattachments/' + encodeURIComponent(attachElement.name)))
        .end(function(response){
            //console.log(response.body)
            console.log(response.headers)
            console.log("Response Status : " + response.status)
            if(response.status == 201){
                console.log("Location Header : "+ response.headers['location'])
            }
            else{
                console.log("X-Request-Id :" + response.headers['x-request-id']);
            }
        });
    } catch (err) {
        console.log(err)
    }

Error thrown -

PS C:\Users\jaywi\Downloads\SW Dev\Heroku Node JS\CSQ> node migratemoretest.js > migrate_output.txt
node:_http_outgoing:566
throw new ERR_HTTP_INVALID_HEADER_VALUE(value, name);
^

TypeError [ERR_HTTP_INVALID_HEADER_VALUE]: Invalid value "undefined" for header "Content-Length"
at ClientRequest.setHeader (node:_http_outgoing:579:3)
at FormData. (C:\Users\jaywi\Downloads\SW Dev\Heroku Node JS\CSQ\node_modules\unirest\node_modules\form-data\lib\form_data.js:321:13)
at C:\Users\jaywi\Downloads\SW Dev\Heroku Node JS\CSQ\node_modules\unirest\node_modules\form-data\lib\form_data.js:265:7
at C:\Users\jaywi\Downloads\SW Dev\Heroku Node JS\CSQ\node_modules\unirest\node_modules\async\lib\async.js:251:17
at done (C:\Users\jaywi\Downloads\SW Dev\Heroku Node JS\CSQ\node_modules\unirest\node_modules\async\lib\async.js:126:15)
at C:\Users\jaywi\Downloads\SW Dev\Heroku Node JS\CSQ\node_modules\unirest\node_modules\async\lib\async.js:32:16
at C:\Users\jaywi\Downloads\SW Dev\Heroku Node JS\CSQ\node_modules\unirest\node_modules\async\lib\async.js:248:21
at C:\Users\jaywi\Downloads\SW Dev\Heroku Node JS\CSQ\node_modules\unirest\node_modules\async\lib\async.js:572:34
at C:\Users\jaywi\Downloads\SW Dev\Heroku Node JS\CSQ\node_modules\unirest\node_modules\form-data\lib\form_data.js:105:13
at FSReqCallback.oncomplete (node:fs:198:21) {
code: 'ERR_HTTP_INVALID_HEADER_VALUE'
}