URL 編碼/解碼工具

常見需要 URL 編碼的字符

以下是在 URL 中使用時需要 URL 編碼的常見字符：

不同程式語言中的 URL 編碼實現

以下是各種程式語言中 URL 編碼和解碼的示例：

// URL encoding
const text = "Hello World! Special chars: &?=/";
const encoded = encodeURIComponent(text);
console.log("Encoded:", encoded);

// URL decoding
const decoded = decodeURIComponent(encoded);
console.log("Decoded:", decoded);

// URL encoding
const text: string = "Hello World! Special chars: &?=/";
const encoded: string = encodeURIComponent(text);
console.log("Encoded:", encoded);

// URL decoding
const decoded: string = decodeURIComponent(encoded);
console.log("Decoded:", decoded);

import urllib.parse

# URL encoding
text = "Hello World! Special chars: &?=/"
encoded = urllib.parse.quote(text)
print(f"Encoded: {encoded}")

# URL decoding
decoded = urllib.parse.unquote(encoded)
print(f"Decoded: {decoded}")

package main

import (
    "fmt"
    "net/url"
)

func main() {
    // Encode a URL
    text := "Hello World! Special chars: &?=/";
    encoded := url.QueryEscape(text)
    fmt.Println("Encoded:", encoded)

    // Decode a URL
    decoded, err := url.QueryUnescape(encoded)
    if err == nil {
        fmt.Println("Decoded:", decoded)
    }
}

<?php
// URL encoding
$text = "Hello World! Special chars: &?=/";
$encoded = urlencode($text);
echo "Encoded: " . $encoded . "\n";

// URL decoding
$decoded = urldecode($encoded);
echo "Decoded: " . $decoded . "\n";
?>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

// Function to URL-encode a string
char *url_encode(char *str) {
    char *encoded = malloc(strlen(str) * 3 + 1);
    char *pstr = str;
    char *pbuf = encoded;

    while (*pstr) {
        if (isalnum(*pstr) || *pstr == '-' || *pstr == '_' || *pstr == '.' || *pstr == '~') {
            *pbuf++ = *pstr;
        } else if (*pstr == ' ') {
            *pbuf++ = '+';
        } else {
            sprintf(pbuf, "%%%.2X", *pstr);
            pbuf += 3;
        }
        pstr++;
    }
    *pbuf = '\0';

    return encoded;
}

int main() {
    char *text = "Hello World! Special chars: &?=/";
    char *encoded = url_encode(text);

    printf("Original: %s\n", text);
    printf("Encoded: %s\n", encoded);

    free(encoded);
    return 0;
}

URL 編碼排錯清單

URL 編碼實用場景

更穩妥的做法是在組合查詢字串之前先編碼參數值。下面這些例子說明應該編碼哪一段，以及為什麼要編碼。