URL.scheme

Declaration and parameters

사용 조건

기본 포함 · 미정

Import std.url in language mode 5.21.

The current compiler selects std/url.tpz for this language mode. Availability in other released editions and inclusion in each installed distribution are Pending.

수신자

URL

매개변수 제약

추가 계약은 미정입니다.

URL.scheme returns the lowercase scheme without its delimiter. URL.host returns Some containing the serialized host without user information or a port. IPv6 hosts include their square brackets.

A URL whose host is absent returns None() from URL.host. A present empty host returns Some containing an empty string. A local file URL can have that empty host.

URL.path returns the serialized path without the query or fragment. A hierarchical path retains its leading slash. An opaque path has no implied slash. Percent escapes stay encoded so an escaped slash remains path data.

URL.fragment returns None() when there is no fragment delimiter. An explicit empty fragment returns Some containing an empty string. A present fragment excludes its delimiter and retains percent encoding.

Scheme, host, path, and fragment inspection cannot fail after construction. Each receiver is evaluated once. The returned strings are immutable and inspection has no external effects.

Read URL.query for decoded query fields. URL.path and URL.fragment do not apply query decoding. In particular, a plus sign in those components remains a plus sign.

결과

추가 계약은 미정입니다.

The declared result type is string.

효과

미정

실패

미정

Result and effects

링크

Returns the lowercase scheme without its delimiter.

Resolved contracts

링크

std.url →

Read serialized URL components and their absence

링크

규칙topaz.stdlib.contract.url-components.rule

Read serialized URL components and their absence

URL.scheme returns the lowercase scheme without its delimiter. URL.host returns Some containing the serialized host without user information or a port. IPv6 hosts include their square brackets.

A URL whose host is absent returns None() from URL.host. A present empty host returns Some containing an empty string. A local file URL can have that empty host.

URL.path returns the serialized path without the query or fragment. A hierarchical path retains its leading slash. An opaque path has no implied slash. Percent escapes stay encoded so an escaped slash remains path data.

URL.fragment returns None() when there is no fragment delimiter. An explicit empty fragment returns Some containing an empty string. A present fragment excludes its delimiter and retains percent encoding.

Scheme, host, path, and fragment inspection cannot fail after construction. Each receiver is evaluated once. The returned strings are immutable and inspection has no external effects.

Read URL.query for decoded query fields. URL.path and URL.fragment do not apply query decoding. In particular, a plus sign in those components remains a plus sign.

이유

Component access must preserve delimiters as data and distinguish absence from an empty component. Encoded path and fragment values can be placed back into a URL without turning an escaped separator into structure.

예제 Read encoded URL components without decoding delimiters →Distinguish an absent fragment from an empty fragment →Read IPv6 and file hosts without losing authority data →Serialize a Unicode domain, path, and fragment →

Read encoded URL components without decoding delimiters

링크

run · running · 검증 · 미실행

main.tpzRead encoded URL components without decoding delimiters플레이그라운드 열기 →

import std.url { URL }
import std.io
match (URL.parse("HTTPS://EXAMPLE.COM:8443/a%2Fb?q=a+b#x%20y")) {
case Ok(value) => {
io.writeLine(value.scheme())
match (value.host()) {
case Some(host) => io.writeLine(host)
case None() => io.writeLine("no host")
}
io.writeLine(value.path())
match (value.fragment()) {
case Some(fragment) => io.writeLine(fragment)
case None() => io.writeLine("no fragment")
}
io.writeLine(value.toString())
}
case Err(_) => io.writeLine("parse failed")
}

기대 출력종료 코드 0

https
example.com
/a%2Fb
x%20y
https://example.com:8443/a%2Fb?q=a+b#x%20y

$ topaz run main.tpz · 대상 제품 5.21.3

기대 결과

실행을 마칩니다. 종료 코드 0.

표준 오류 출력 없음.

기대 표준 출력

https
example.com
/a%2Fb
x%20y
https://example.com:8443/a%2Fb?q=a+b#x%20y

이 예제는 아직 실행하지 않았습니다.

Distinguish an absent fragment from an empty fragment

링크

run · running · 검증 · 미실행

main.tpzDistinguish an absent fragment from an empty fragment플레이그라운드 열기 →

import std.url { URL }
import std.io
for text in (["mailto:reader@example.com", "mailto:reader@example.com#"]) {
match (URL.parse(text)) {
case Ok(value) => {
io.writeLine(value.scheme())
match (value.host()) {
case None() => io.writeLine("no host")
case Some(host) => io.writeLine("host={host}")
}
io.writeLine(value.path())
match (value.fragment()) {
case None() => io.writeLine("no fragment")
case Some(fragment) => io.writeLine("fragment={fragment}")
}
io.writeLine("{value.query().length}")
}
case Err(_) => io.writeLine("parse failed")
}
}

기대 출력종료 코드 0

mailto
no host
reader@example.com
no fragment
0
mailto
no host
reader@example.com
fragment=
0

$ topaz run main.tpz · 대상 제품 5.21.3

기대 결과

실행을 마칩니다. 종료 코드 0.

표준 오류 출력 없음.

기대 표준 출력

mailto
no host
reader@example.com
no fragment
0
mailto
no host
reader@example.com
fragment=
0

이 예제는 아직 실행하지 않았습니다.

Read IPv6 and file hosts without losing authority data

링크

run · running · 검증 · 미실행

main.tpzRead IPv6 and file hosts without losing authority data플레이그라운드 열기 →

import std.url { URL }
import std.io
for text in (["https://u:p@[2001:DB8::1]:443/", "file:///tmp/a"]) {
match (URL.parse(text)) {
case Ok(value) => {
match (value.host()) {
case Some(host) => io.writeLine("host={host}")
case None() => io.writeLine("no host")
}
io.writeLine(value.toString())
}
case Err(_) => io.writeLine("parse failed")
}
}

기대 출력종료 코드 0

host=[2001:db8::1]
https://u:p@[2001:db8::1]/
host=
file:///tmp/a

$ topaz run main.tpz · 대상 제품 5.21.3

기대 결과

실행을 마칩니다. 종료 코드 0.

표준 오류 출력 없음.

기대 표준 출력

host=[2001:db8::1]
https://u:p@[2001:db8::1]/
host=
file:///tmp/a

이 예제는 아직 실행하지 않았습니다.

Serialize a Unicode domain, path, and fragment

링크

run · running · 검증 · 미실행

main.tpzSerialize a Unicode domain, path, and fragment플레이그라운드 열기 →

import std.url { URL }
import std.io
match (URL.parse("https://bücher.example/한#α")) {
case Ok(value) => {
match (value.host()) {
case Some(host) => io.writeLine(host)
case None() => io.writeLine("no host")
}
io.writeLine(value.path())
match (value.fragment()) {
case Some(fragment) => io.writeLine(fragment)
case None() => io.writeLine("no fragment")
}
io.writeLine(value.toString())
}
case Err(_) => io.writeLine("parse failed")
}

기대 출력종료 코드 0

xn--bcher-kva.example
/%ED%95%9C
%CE%B1
https://xn--bcher-kva.example/%ED%95%9C#%CE%B1

$ topaz run main.tpz · 대상 제품 5.21.3

기대 결과

실행을 마칩니다. 종료 코드 0.

표준 오류 출력 없음.

기대 표준 출력

xn--bcher-kva.example
/%ED%95%9C
%CE%B1
https://xn--bcher-kva.example/%ED%95%9C#%CE%B1

이 예제는 아직 실행하지 않았습니다.

문서 검색

Declaration and parameters

사용 조건

수신자

매개변수 제약

결과

효과

실패

Result and effects

Resolved contracts

Read serialized URL components and their absence

Read serialized URL components and their absence

이유

Read encoded URL components without decoding delimiters

기대 결과

Distinguish an absent fragment from an empty fragment

기대 결과

Read IPv6 and file hosts without losing authority data

기대 결과

Serialize a Unicode domain, path, and fragment

기대 결과

메뉴

Declaration and parameters

사용 조건

수신자

매개변수 제약

결과

효과

실패

Result and effects

Resolved contracts

Related entries

Read serialized URL components and their absence

Read serialized URL components and their absence

이유

Read encoded URL components without decoding delimiters

기대 결과

Distinguish an absent fragment from an empty fragment

기대 결과

Read IPv6 and file hosts without losing authority data

기대 결과

Serialize a Unicode domain, path, and fragment

기대 결과