mirror of
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90 lines
3.8 KiB
Markdown
90 lines
3.8 KiB
Markdown
[](https://opensource.org/licenses/Apache-2.0)
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[](https://s01.oss.sonatype.org/content/repositories/snapshots/com/uwyn/urlencoder/)
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[](https://github.com/gbevin/urlencoder/releases/latest)
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[](https://maven-badges.herokuapp.com/maven-central/com.uwyn/urlencoder)
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[](https://sonarcloud.io/dashboard?id=gbevin_urlencoder)
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[](https://github.com/gbevin/urlencoder/actions/workflows/gradle.yml)
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[](https://github.com/gbevin/urlencoder/actions/workflows/gradle.yml)
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# URL Encoder for Java
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A simple library to encode/decode URL parameters.
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This library was extracted from the [RIFE2 Web Application Framework](https://rife2.com).
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A Kotlin version can also be found at [https://github.com/ethauvin/urlencoder](https://github.com/ethauvin/urlencoder).
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For decades, we've been using [java.net.URLEncoder](https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/net/URLEncoder.html)
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because of its improper naming. It is actually intended to encode HTML form
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parameters, not URLs, causing the wrong escape sequences to be used.
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Additionally, `java.net.URLEncoder` allocates memory even when no encoding is
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necessary, significantly impacting performance. This library has a negligible
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performance impact when a specified string doesn't need to be encoded.
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Android's [Uri.encode](https://developer.android.com/reference/android/net/Uri#encode(java.lang.String,%20java.lang.String))
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also addresses these issues, but does not currently support [unicode surrogate pairs](https://learn.microsoft.com/en-us/globalization/encoding/surrogate-pairs).
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## Examples (TL;DR)
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```java
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UrlEncoder.encode("a test &"); // -> "a%20test%20%26"
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UrlEncoder.encode("%#okékÉȢ smile!😁"); // -> "%25%23ok%C3%A9k%C3%89%C8%A2%20smile%21%F0%9F%98%81"
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UrlEncoder.encode("?test=a test", "?="); // -> ?test=a%20test
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UrlEncoder.decode("a%20test%20%26"); // -> "a test &"
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UrlEncoder.decode("%25%23ok%C3%A9k%C3%89%C8%A2%20smile%21%F0%9F%98%81"); // -> "%#okékÉȢ smile!😁"
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```
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## Gradle, Maven, etc.
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To use with [Gradle](https://gradle.org/), include the following dependency in your build file:
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```gradle
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dependencies {
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implementation("com.uwyn:urlencoder:1.0.0")
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}
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```
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Instructions for using with Maven, Ivy, etc. can be found on [Maven Central](https://maven-badges.herokuapp.com/maven-central/com.uwyn/urlencoder).
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## Standalone usage
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UrlEncoder can be used on the command line also, both for encoding and decoding.
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You have two options:
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* run it with Gradle
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* build the jar and launch it with Java
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The usage is as follows:
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```
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Encode and decode URL parameters.
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-e encode (default)
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-d decode
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```
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### Running with Gradle
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```shell
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./gradlew run --args="-e 'a test &'" # -> a%20test%20%26
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./gradlew run --args="%#okékÉȢ" # -> %25%23ok%C3%A9k%C3%89%C8%A2
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./gradlew run --args="-d 'a%20test%20%26'" # -> a test &
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```
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### Running with Java
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First build the jar file:
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```shell
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./gradlew clean jar
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```
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Then run it:
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```shell
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java -jar lib/build/libs/urlencoder-*.jar -e "a test &" # -> a%20test%20%26
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java -jar lib/build/libs/urlencoder-*.jar "%#okékÉȢ" # -> %25%23ok%C3%A9k%C3%89%C8%A2
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java -jar lib/build/libs/urlencoder-*.jar -d "a%20test%20%26" # -> a test &
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```
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