HTTP Headers not working - newbie issue

[gazoniricardo-bit]

Hi, folks,

I am not a technical user, and this is why I am a little worried. I've been using HTTP for a long time; I've invested a lot of my free time in creating an app in Julia that I intend to go commercial with soon.

In the last Julia update, I found that return HTTP.Response(200, ["Content-Type:" => "text/javascript; charset=utf-8"], retval) issues a header error even when retval contains JavaScript text.

I am probably doing something wrong, but there is nowhere to search for help.

I hope you'll pardon my intrusion, but I don't know what to do. Is it possible that the package is defective?

Thanks for your attention.

[quinnj]

Can you share the exact error you're seeing? It's hard to know what went wrong or how to help fix without more details here.

[fredrikekre]

"Content-Type:" => "Content-Type"?

[gazoniricardo-bit]

Sorry for that! Of course, here is what I see in REPL:

┌ Error: handle_connection handler error. 
│ 
│ ===========================
│ HTTP Error message:
│ 
│ ERROR: ArgumentError: Invalid header key or value
│ Stacktrace:
│   [1] mkheaders(h::Vector{Pair{String, String}}, headers::Vector{Pair{SubString{String}, SubString{String}}})
│     @ HTTP.Messages ~/.julia/packages/HTTP/ShTJs/src/Messages.jl:215
│   [2] mkheaders
│     @ ~/.julia/packages/HTTP/ShTJs/src/Messages.jl:209 [inlined]
│   [3] #Response#1
│     @ ~/.julia/packages/HTTP/ShTJs/src/Messages.jl:108 [inlined]
│   [4] Response
│     @ ~/.julia/packages/HTTP/ShTJs/src/Messages.jl:105 [inlined]
│   [5] word_aggregation_js(req::HTTP.Messages.Request)
│     @ Main ~/Documents/clientes/Reduti/app/official/src/web/util_http_spec_1.jl:22
│   [6] (::HTTP.Handlers.Router{typeof(HTTP.Handlers.default404), typeof(HTTP.Handlers.default405), Nothing})(req::HTTP.Messages.Request)
│     @ HTTP.Handlers ~/.julia/packages/HTTP/ShTJs/src/Handlers.jl:439
│   [7] http_handler(req::HTTP.Messages.Request)
│     @ Main ~/Documents/clientes/Reduti/app/official/src/web/http_spec.jl:166
│   [8] (::HTTP.Handlers.var"#streamhandler##0#streamhandler##1"{typeof(http_handler)})(stream::HTTP.Streams.Stream{HTTP.Messages.Request, HTTP.Connections.Connection{TCPSocket}})
│     @ HTTP.Handlers ~/.julia/packages/HTTP/ShTJs/src/Handlers.jl:58
│   [9] handle_connection(f::Function, c::HTTP.Connections.Connection{TCPSocket}, listener::HTTP.Servers.Listener{Nothing, Sockets.TCPServer}, readtimeout::Int64, access_log::Nothing, verbose::Bool)
│     @ HTTP.Servers ~/.julia/packages/HTTP/ShTJs/src/Servers.jl:469
│  [10] (::HTTP.Servers.var"#listenloop##0#listenloop##1"{HTTP.Handlers.var"#streamhandler##0#streamhandler##1"{typeof(http_handler)}, HTTP.Servers.Listener{Nothing, Sockets.TCPServer}, Set{HTTP.Connections.Connection}, Int64, Nothing, ReentrantLock, Bool, Base.Semaphore, HTTP.Connections.Connection{TCPSocket}})()
│     @ HTTP.Servers ~/.julia/packages/HTTP/ShTJs/src/Servers.jl:401
│   request =
│    HTTP.Messages.Request:
│    """
│    GET /js_word_aggregation.js HTTP/1.0
│    Host: 192.168.15.24:8080
│    Connection: close
│    Authorization: ******
│    sec-ch-ua-platform: "Linux"
│    User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36
│    sec-ch-ua: "Google Chrome";v="141", "Not?A_Brand";v="8", "Chromium";v="141"
│    sec-ch-ua-mobile: ?0
│    Accept: */*
│    Sec-Fetch-Site: same-origin
│    Sec-Fetch-Mode: no-cors
│    Sec-Fetch-Dest: script
│    Referer: http://localhost/word_aggregation
│    Accept-Encoding: gzip, deflate, br, zstd
│    Accept-Language: en-US,en;q=0.9,pt-BR;q=0.8,pt;q=0.7
│    GazUN: godfather
│    GazDIR: 676f64666174686572
│    
│    """
└ @ HTTP.Servers ~/.julia/packages/HTTP/

And here is what you see at ~/Documents/clientes/Reduti/app/official/src/web/util_http_spec_1.jl:22

return HTTP.Response(200, ["Content-Type:" => "text/html; charset=utf-8"], retval)

retval contains a JavaScript program.

Interestingly, getting rid of the ":", as suggested by @fredrikekre, resolved the issue, despite "text/html" not being the 100% correct MIME type.

I believe this solves the problem! Thanks, guys!