newtrat
The documentation for :body_reader in Plug.Parsers includes this example:
defmodule CacheBodyReader do
def read_body(conn, opts) do
{:ok, body, conn} = Plug.Conn.read_body(conn, opts)
conn = update_in(conn.assigns[:raw_body], &[body | (&1 || [])])
{:ok, body, conn}
end
end
Why does this example use
conn = update_in(conn.assigns[:raw_body], &[body | (&1 || [])])
rather than
conn = Plug.Conn.assign(conn, :raw_body, body)
Does the assign need to be an array? Are there other plugs that use conn.assigns[:raw_body], and don’t want it to be overwritten?
Where Next?
Trending in Questions
Other Trending Topics
Latest on Elixir Forum
Sponsor Spotlight
Supporting innovation across the BEAM ecosystem.
Categories:
Sub Categories:
Forums
Popular Tags
- #ecto
- #liveview
- #troubleshooting
- #learning-elixir
- #library
- #deployment
- #erlang
- #testing
- #genserver
- #mix
- #absinthe
- #remote-other
- #otp
- #plug
- #how-to-question
- #macros
- #postgres
- #elixirconf
- #channels
- #exunit
- #code-sync
- #discussion
- #podcasts
- #javascript
- #onsite
- #dialyzer
- #docker
- #authentication
- #ai
- #umbrella
- #full-time-contract
- #podcasts-by-brainlid
- #elixirconf-us
- #blog-post
- #ecto-query
- #elixir-ls
- #phoenix_html
- #iex
- #graphql
- #genstage
- #websockets
- #supervisor
- #advent-of-code
- #distillery
- #elixirconf-eu
- #processes
- #security
- #api
- #forms
- #performance
Our Sponsors
Build Elixir applications with speed and confidence.
Supporting innovation across the BEAM ecosystem.
We build reliable cloud platforms for business-critical systems.
Catch errors, track performance, monitor hosts and more.
Elixir, Erlang & BEAM conferences from Code Sync. Next: ElixirConf EU 2027
Practical resources that improve the lives of professional developers.
Master modern tools, write cleaner code, and tackle real-world challenges.
Bringing learning, work and compliance together since 1987.
The team behind Membrane, Popcorn, LiveDebugger. Available for hire.
Courses that'll move you from confusion to "Aha, now I get it!"
Showing Posts 1 to 2- Show Best Posts
- Show All (oldest first)
- Show All (newest first)
hauleth
Few things:
LostKobrakai
I guess the missing piece here is that the raw body might be parsed in multiple steps making the
read_body/2function be called multiple times.