search steam store

src/dune

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+(executable
+ (name main)
+ (libraries mechaml))

src/main.ml

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+open Mechaml
+module M = Agent.Monad
+open M.Infix
+
+let require msg = function
+  | Some a -> a
+  | None -> failwith msg
+
+let steam_search query =
+  let url = "https://store.steampowered.com/" in
+  Agent.get url
+  >|= (fun result ->
+    let form = result
+      |> Agent.HttpResponse.page
+      |> Page.form_with "[id=searchform]"
+      |> require "search form not found" in
+    let field = form
+      |> Page.Form.field_with "[name=term]"
+      |> require "q field not found" in
+    Page.Form.Field.set form field query)
+  >>= Agent.submit
+  >>= (fun response ->
+    response
+    |> Agent.HttpResponse.content
+    |> M.save_content "steam-result.html")
+
+let _ =
+  M.run (Agent.init ()) (steam_search "planet")