How to pass "Content-Length" value in header using Curl Command

Question

How can I pass content-length eg. --header Content-Length:1000 in curl command. I used it like this in command but it did't work

curl -v -X POST -u "[email protected]:xxx123" \ 
     --header "Content-Length: 1000" \
     --header "Content-Type: multipart/mixed" \
     --header "X-REQUEST-ID:7fc7d038-4306-4fc5-89c3-7ac8a12a30d0" \
     -F "request={\"bumId\":\"d51f2978-5ce8-4c71-8503-b0ca438741dd\",\"fileType\":\"imageFile\"};type=application/json" \
     -F "file=@D:/file.pdf" \
     "http://localhost:9090/pro/v1/files"

This command posts file to a web services developed in Jersey Java

Fangxing · Accepted Answer · 2021-06-14 03:08:15Z

51

You can use -d "" causes CURL to send a Content-Length: 0,

see Header 'Content-Length: 0' is missing when I do curl -X POST $URI

edited Jun 14, 2021 at 3:08

answered Nov 22, 2017 at 3:09

Fangxing

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3 Comments

Wenhan Xiao Over a year ago

So whats the solution? remove the -d ?

Drew Delano Over a year ago

@WenhanXiao the original example is missing the -d "" which causes curl to compute the content-length

e-Fungus Over a year ago

see answer with -H for specific header values.

Stefan van den Akker · Accepted Answer · 2023-12-24 10:45:09Z

13

Adding a header like this should do the trick:

-H 'content-length: 1000'

Full example:

$ curl -v -XPOST -H 'content-length: 1000' https://example.com
# ... snip ...
> POST / HTTP/2
> Host: example.com
> User-Agent: curl/8.5.0
> Accept: */*
> content-length: 1000
>
# ... snip ...

edited Dec 24, 2023 at 10:45

Stefan van den Akker

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answered Jul 20, 2017 at 12:04

Gino Pane

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Comments

Bonifacio2 · Accepted Answer · 2019-04-25 18:27:15Z

9

Try this: curl -X POST http://localhost:9090/pro/v1/files -d "Content-Length: 0"

curl's -d flag allows you to add data to the body of the request. According to its docs:

-d, --data (HTTP) Sends the specified data in a POST request to the HTTP server, in the same way that a browser does when a user has filled in an HTML form and presses the submit button. This will cause curl to pass the data to the server using the content-type application/x-www-form-urlencoded.

edited Apr 25, 2019 at 18:27

Bonifacio2

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answered Jul 20, 2017 at 11:55

MaxLis

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3 Comments

user1694691 Over a year ago

Welcome to Stack Overflow! I would suggest adding an explanation to your answer so that people with a similar problem are better able to understand the solution. Perhaps explain what the -d flag is? Maybe add a snippet from the Curl manual?

user2297550 Over a year ago

are you sure this is correct? -d is to specify the data to be posted

blackr1234 Over a year ago

Downvoted. -d is for request body. -H is for request header. By having -d "Content-Length: 0", you are sending the text as the request body.

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