# Use \`mitmproxy\` with Julia AWS.jl

**URL:** <https://discourse.julialang.org/t/use-mitmproxy-with-julia-aws-jl/50524>\
**Category:** General Usage\
**Tags:** sockets\
**Created:** [November 21, 2020, 4:58am UTC](https://discourse.julialang.org/t/use-mitmproxy-with-julia-aws-jl/50524 "2020-11-21T04:58:11Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Roger-luo](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/roger-luo/32/3399_2.png) [@Roger-luo](https://discourse.julialang.org/u/Roger-luo)\
**Post date:** [November 21, 2020, 4:58am UTC](https://discourse.julialang.org/t/use-mitmproxy-with-julia-aws-jl/50524/1 "2020-11-21T04:58:11Z")

</div>

I was trying to use `mitmproxy` to debug a AWS connection issue, however it produces the following error, any idea why?

```julia
ERROR: DNSError: , unknown node or service (EAI_NONAME)
Stacktrace:
 [1] getalladdrinfo(::String) at /Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/Sockets/src/addrinfo.jl:112
 [2] getalladdrinfo at /Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/Sockets/src/addrinfo.jl:121 [inlined]
 [3] getconnection(::Type{Sockets.TCPSocket}, ::SubString{String}, ::SubString{String}; keepalive::Bool, connect_timeout::Int64, kw::Base.Iterators.Pairs{Symbol,Union{Nothing, Bool},Tuple{Symbol,Symbol,Symbol},NamedTuple{(:require_ssl_verification, :iofunction, :reached_redirect_limit),Tuple{Bool,Nothing,Bool}}}) at /Users/roger/.julia/packages/HTTP/IAI92/src/ConnectionPool.jl:630
 [4] #newconnection#25 at /Users/roger/.julia/packages/HTTP/IAI92/src/ConnectionPool.jl:597 [inlined]
 [5] getconnection(::Type{HTTP.ConnectionPool.Transaction{Sockets.TCPSocket}}, ::SubString{String}, ::SubString{String}; connection_limit::Int64, pipeline_limit::Int64, idle_timeout::Int64, reuse_limit::Int64, require_ssl_verification::Bool, kw::Base.Iterators.Pairs{Symbol,Union{Nothing, Bool},Tuple{Symbol,Symbol},NamedTuple{(:iofunction, :reached_redirect_limit),Tuple{Nothing,Bool}}}) at /Users/roger/.julia/packages/HTTP/IAI92/src/ConnectionPool.jl:541

```

you should be able to reproduce this by following steps (similar to boto3 version: [python - How to view Boto3 HTTPS request string - Stack Overflow](https://stackoverflow.com/questions/29929540/how-to-view-boto3-https-request-string) ):

1. install `mitmproxy` and run it
2. export proxies

```nohighlight
export http_proxy=127.0.0.1:8080
export https_proxy=$http_proxy

```

then run (this request itself will have a 403 error, but if the proxy is set then Julia will just fail)

```julia
using AWS: @service
@service Braket
Braket.get_device("arn:aws:braket:::device/quantum-simulator/amazon/sv1")

```