API RESTful API 是什麼 Representational state transfer (REST) 表現層狀態轉換 Client Server REQUEST RESPONSE GET https://localhost/api/v1/articles/1 HTTP STATUS : 200 OK HTTP 協定 HTTP VERBS. URL. HTTP 14:07:22" } } 201 CREATED https://localhost/api/v1/articles Headers Headers Body Body REQUEST RESPONSE JSON Accept : application/json Content-Type : application/json Content-Type : application/json 14:07:22" } } 201 CREATED Request Response { "title": "我是標題⽂字", "content": "我是內容" } 查看單⼀資源 GET https://localhost/api/v1/articles/1 Response Request { "data": { "id":

("Checking {:#}", command.url); let response = client.get(command.url.clone()).send()?; if !response.status().is_success() { return Err(Error::BadResponse(response.status().to_string())); } let mut Vec::new(); if !command.extract_links { return Ok(link_urls); } let base_url = response.url().to_owned(); let body_text = response.text()?; let document = Html::parse_document(&body_text); let selector = ("Checking {:#}", command.url); let response = client.get(command.url.clone()).send()?; if !response.status().is_success() { return Err(Error::BadResponse(response.status().to_string())); } let mut

specified, a temporary path. The output can also be an IO handle, in which case the body of the response is streamed to that handle and the handle is returned. If output is a command, the command is run = , ] [ throw = true, ] [ downloader = , ] [ interrupt = , ] ) -> Union{Response, RequestError} url :: AbstractString input :: Union{AbstractString, AbstractCmd, IO} output :: Make a request to the given url, returning a Response object capturing the status, headers and other information about the response. The body of the response is written to output if specified and discarded

specified, a temporary path. The output can also be an IO handle, in which case the body of the response is streamed to that handle and the handle is returned. If output is a command, the command is run = , ] [ throw = true, ] [ downloader = , ] [ interrupt = , ] ) -> Union{Response, RequestError} url :: AbstractString input :: Union{AbstractString, AbstractCmd, IO} output :: Make a request to the given url, returning a Response object capturing the status, headers and other information about the response. The body of the response is written to output if specified and discarded

ScopedValue(:GUEST) function serve(request, response) level = isAdmin(request) ? :ADMIN : :GUEST with(LEVEL => level) do Threads.@spawn handle(request, response) end end function open(connection::Database) == :ADMIN error("Access disallowed") end # ... open connection end function handle(request, response) # ... open(Database(#=...=#))CHAPTER 50. SCOPED VALUES 1132 # ... end 50.2 Idioms Unshare specified, a temporary path. The output can also be an IO handle, in which case the body of the response is streamed to that handle and the handle is returned. If output is a command, the command is run

ScopedValue(:GUEST) function serve(request, response) level = isAdmin(request) ? :ADMIN : :GUEST with(LEVEL => level) do Threads.@spawn handle(request, response) end end function open(connection::Database) == :ADMIN error("Access disallowed") end # ... open connection end function handle(request, response) # ... open(Database(#=...=#))CHAPTER 50. SCOPED VALUES 1132 # ... end 50.2 Idioms Unshare specified, a temporary path. The output can also be an IO handle, in which case the body of the response is streamed to that handle and the handle is returned. If output is a command, the command is run

ScopedValue(:GUEST) function serve(request, response) level = isAdmin(request) ? :ADMIN : :GUEST with(LEVEL => level) do Threads.@spawn handle(request, response) end end function open(connection::Database) == :ADMIN error("Access disallowed") end # ... open connection end function handle(request, response) # ... open(Database(#=...=#))CHAPTER 50. SCOPED VALUES 1132 # ... end 50.2 Idioms Unshare specified, a temporary path. The output can also be an IO handle, in which case the body of the response is streamed to that handle and the handle is returned. If output is a command, the command is run

ScopedValue(:GUEST) function serve(request, response) level = isAdmin(request) ? :ADMIN : :GUEST with(LEVEL => level) do Threads.@spawn handle(request, response) end end function open(connection::Database) == :ADMIN error("Access disallowed") end # ... open connection end function handle(request, response) # ... open(Database(#=...=#))CHAPTER 51. SCOPED VALUES 1181 # ... end 51.2 Idioms Unshare specified, a temporary path. The output can also be an IO handle, in which case the body of the response is streamed to that handle and the handle is returned. If output is a command, the command is run

ScopedValue(:GUEST) function serve(request, response) level = isAdmin(request) ? :ADMIN : :GUEST with(LEVEL => level) do Threads.@spawn handle(request, response) end end function open(connection::Database) == :ADMIN error("Access disallowed") end # ... open connection end function handle(request, response) # ... open(Database(#=...=#))CHAPTER 51. SCOPED VALUES 1179 # ... end 51.2 Idioms Unshare specified, a temporary path. The output can also be an IO handle, in which case the body of the response is streamed to that handle and the handle is returned. If output is a command, the command is run

ScopedValue(:GUEST) function serve(request, response) level = isAdmin(request) ? :ADMIN : :GUEST with(LEVEL => level) do Threads.@spawn handle(request, response) end end function open(connection::Database) == :ADMIN error("Access disallowed") end # ... open connection end function handle(request, response) # ... open(Database(#=...=#))CHAPTER 51. SCOPED VALUES 1178 # ... end 51.2 Idioms Unshare specified, a temporary path. The output can also be an IO handle, in which case the body of the response is streamed to that handle and the handle is returned. If output is a command, the command is run