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‎.gitignore‎

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*.class
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*.swp
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.idea
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.vscode
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.DS_Store
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*.iml
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# exclude jar for gradle wrapper
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!gradle/wrapper/*.jar
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# Gradle files
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.gradle/*
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build/*
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out/*
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*/build/*
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*/out/*
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# compiler output
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bin/
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*/bin/

‎README.md‎

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# wechatpay-apache-httpclient
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## 概览
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[微信支付API v3](https://wechatpay-api.gitbook.io/wechatpay-api-v3/)的[Apache HttpClient](https://hc.apache.org/httpcomponents-client-ga/index.html)扩展，实现了请求签名的生成和应答签名的验证。
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如果你是使用Apache HttpClient的商户开发者，可以使用它构造`HttpClient`。得到的`HttpClient`在执行请求时将自动携带身份认证信息，并检查应答的微信支付签名。
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## 项目状态
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当前版本为测试版，尚没经过严格的功能和兼容性测试。请商户的专业技术人员在使用时注意系统和软件的正确性和兼容性。由此带来的风险，由商户自行承担。
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## 环境要求
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我们开发和测试使用的环境如下。
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+ Java 1.8
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+ Apache HttpClient 4.5.8
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根据所依赖的接口，Apache HttpClient的版本大于4.3.1即可以使用，建议使用4.4以上版本。
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## 开始
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如果你使用的是`HttpClientBuilder`或者`HttpClients#custom()`来构造`HttpClient`，你可以直接替换为`WechatPayHttpClientBuilder`。我们提供相应的方法，可以方便的传入商户私钥和微信支付平台证书等信息。
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```java
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WechatPayHttpClientBuilder builder = WechatPayHttpClientBuilder.create()
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.withMerchant(merchantId, merchantSerialNumber, merchantPrivateKey)
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.withWechatpay(wechatpayCertificates);
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// ... 接下来，你仍然可以通过builder设置各种参数，来配置你的HttpClient
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// 通过WechatPayHttpClientBuilder构造的HttpClient，会自动的处理签名和验签
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HttpClient httpClient = builder.build();
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// 后面跟使用Apache HttpClient一样
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HttpResponse response = httpClient.execute(...);
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```
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## 定制
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当默认的本地签名和验签方式不适合你的系统时，你可以通过实现`Signer`或者`Verifier`来定制签名和验签。比如，你的系统把商户私钥集中存储，业务系统需通过远程调用进行签名，你可以这样做。
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```java
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Credentials credentials = new WechatPay2Credentials(merchantId, new Signer() {
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@Override
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public Signer.SignatureResult sign(byte[] message) {
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// ... call your sign-RPC, then return sign & serial number
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}
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});
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WechatPayHttpClientBuilder builder = WechatPayHttpClientBuilder.create()
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.withCredentials(credentials)
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.withWechatpay(wechatpayCertificates);
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```
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## 常见问题
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### 如何下载平台证书？
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使用`WechatPayHttpClientBuilder`需要调用`withWechatpay`设置[微信支付平台证书](https://wechatpay-api.gitbook.io/wechatpay-api-v3/ren-zheng/zheng-shu#ping-tai-zheng-shu)，而平台证书又只能通过调用[获取平台证书接口](https://wechatpay-api.gitbook.io/wechatpay-api-v3/jie-kou-wen-dang/ping-tai-zheng-shu#huo-qu-ping-tai-zheng-shu-lie-biao)下载。为了解开"死循环"，你可以在第一次下载平台证书时，按照下述方法临时"跳过”应答签名的验证。
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```java
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CloseableHttpClient httpClient = WechatPayHttpClientBuilder.create()
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.withMerchant(mchId, mchSerialNo, merchantPrivateKey)
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.withValidator(response -> true) // NOTE: 设置一个空的应答签名验证器，**不要**用在业务请求
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.build();
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```
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**注意**：业务请求请使用标准的初始化流程，务必验证应答签名。
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## 联系我们
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如果你发现了**BUG**或者有任何疑问，请通过issue进行反馈。
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也欢迎访问我们的[开发者社区](https://developers.weixin.qq.com/community/pay)。
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‎build.gradle‎

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plugins {
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id 'java-library'
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}
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group 'com.wechat.pay'
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version '0.1.3'
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sourceCompatibility = 1.8
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repositories {
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jcenter()
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}
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ext {
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httpclient_version = "4.5.8"
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slf4j_version = "1.7.26"
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junit_version = "4.12"
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}
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dependencies {
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api "org.apache.httpcomponents:httpclient:$httpclient_version"
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implementation "org.slf4j:slf4j-api:$slf4j_version"
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testImplementation "junit:junit:$junit_version"
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}
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jar {
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manifest {
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attributes('Implementation-Title': 'wechatpay-java',
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'Implementation-Version': project.version,
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'Export-Package': 'com.wechat.pay.*'
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)
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}
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}

‎gradle/wrapper/gradle-wrapper.jar‎

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‎gradle/wrapper/gradle-wrapper.properties‎

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distributionBase=GRADLE_USER_HOME
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distributionPath=wrapper/dists
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distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-bin.zip
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zipStoreBase=GRADLE_USER_HOME
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zipStorePath=wrapper/dists

‎gradlew‎

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#!/usr/bin/env sh
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##############################################################################
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##
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## Gradle start up script for UN*X
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##
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##############################################################################
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# Attempt to set APP_HOME
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# Resolve links: $0 may be a link
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PRG="$0"
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# Need this for relative symlinks.
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while [ -h "$PRG" ] ; do
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ls=`ls -ld "$PRG"`
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link=`expr "$ls" : '.*-> \(.*\)$'`
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if expr "$link" : '/.*' > /dev/null; then
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PRG="$link"
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else
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PRG=`dirname "$PRG"`"/$link"
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fi
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done
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SAVED="`pwd`"
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cd "`dirname \"$PRG\"`/" >/dev/null
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APP_HOME="`pwd -P`"
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cd "$SAVED" >/dev/null
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APP_NAME="Gradle"
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APP_BASE_NAME=`basename "$0"`
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# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
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DEFAULT_JVM_OPTS=""
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# Use the maximum available, or set MAX_FD != -1 to use that value.
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MAX_FD="maximum"
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warn () {
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echo "$*"
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}
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die () {
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echo
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echo "$*"
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echo
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exit 1
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}
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# OS specific support (must be 'true' or 'false').
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cygwin=false
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msys=false
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darwin=false
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nonstop=false
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case "`uname`" in
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CYGWIN* )
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cygwin=true
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;;
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Darwin* )
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darwin=true
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;;
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MINGW* )
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msys=true
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;;
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NONSTOP* )
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nonstop=true
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;;
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esac
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CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
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# Determine the Java command to use to start the JVM.
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if [ -n "$JAVA_HOME" ] ; then
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if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
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# IBM's JDK on AIX uses strange locations for the executables
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JAVACMD="$JAVA_HOME/jre/sh/java"
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else
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JAVACMD="$JAVA_HOME/bin/java"
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fi
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if [ ! -x "$JAVACMD" ] ; then
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die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
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Please set the JAVA_HOME variable in your environment to match the
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location of your Java installation."
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fi
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else
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JAVACMD="java"
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which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
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Please set the JAVA_HOME variable in your environment to match the
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location of your Java installation."
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fi
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# Increase the maximum file descriptors if we can.
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if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
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MAX_FD_LIMIT=`ulimit -H -n`
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if [ $? -eq 0 ] ; then
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if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
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MAX_FD="$MAX_FD_LIMIT"
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fi
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ulimit -n $MAX_FD
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if [ $? -ne 0 ] ; then
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warn "Could not set maximum file descriptor limit: $MAX_FD"
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fi
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else
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warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
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fi
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fi
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# For Darwin, add options to specify how the application appears in the dock
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if $darwin; then
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GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
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fi
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# For Cygwin, switch paths to Windows format before running java
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if $cygwin ; then
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APP_HOME=`cygpath --path --mixed "$APP_HOME"`
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CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
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JAVACMD=`cygpath --unix "$JAVACMD"`
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# We build the pattern for arguments to be converted via cygpath
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ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
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SEP=""
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for dir in $ROOTDIRSRAW ; do
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ROOTDIRS="$ROOTDIRS$SEP$dir"
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SEP="|"
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done
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OURCYGPATTERN="(^($ROOTDIRS))"
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# Add a user-defined pattern to the cygpath arguments
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if [ "$GRADLE_CYGPATTERN" != "" ] ; then
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OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
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fi
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# Now convert the arguments - kludge to limit ourselves to /bin/sh
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i=0
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for arg in "$@" ; do
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CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
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CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
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if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
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eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
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else
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eval `echo args$i`="\"$arg\""
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fi
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i=$((i+1))
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done
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case $i in
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(0) set -- ;;
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(1) set -- "$args0" ;;
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(2) set -- "$args0" "$args1" ;;
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(3) set -- "$args0" "$args1" "$args2" ;;
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(4) set -- "$args0" "$args1" "$args2" "$args3" ;;
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(5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
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(6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
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(7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
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(8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
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(9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
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esac
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fi
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# Escape application args
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save () {
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for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
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echo " "
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}
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APP_ARGS=$(save "$@")
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# Collect all arguments for the java command, following the shell quoting and substitution rules
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eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
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# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
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if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
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cd "$(dirname "$0")"
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fi
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exec "$JAVACMD" "$@"

‎gradlew.bat‎

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@if "%DEBUG%" == "" @echo off
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@rem ##########################################################################
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@rem
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@rem Gradle startup script for Windows
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@rem
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@rem ##########################################################################
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@rem Set local scope for the variables with windows NT shell
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if "%OS%"=="Windows_NT" setlocal
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set DIRNAME=%~dp0
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if "%DIRNAME%" == "" set DIRNAME=.
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set APP_BASE_NAME=%~n0
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set APP_HOME=%DIRNAME%
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@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
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set DEFAULT_JVM_OPTS=
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@rem Find java.exe
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if defined JAVA_HOME goto findJavaFromJavaHome
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set JAVA_EXE=java.exe
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%JAVA_EXE% -version >NUL 2>&1
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if "%ERRORLEVEL%" == "0" goto init
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echo.
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echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
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echo.
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echo Please set the JAVA_HOME variable in your environment to match the
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echo location of your Java installation.
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goto fail
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:findJavaFromJavaHome
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set JAVA_HOME=%JAVA_HOME:"=%
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set JAVA_EXE=%JAVA_HOME%/bin/java.exe
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if exist "%JAVA_EXE%" goto init
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echo.
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echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
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echo.
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echo Please set the JAVA_HOME variable in your environment to match the
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echo location of your Java installation.
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goto fail
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:init
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@rem Get command-line arguments, handling Windows variants
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if not "%OS%" == "Windows_NT" goto win9xME_args
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:win9xME_args
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@rem Slurp the command line arguments.
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set CMD_LINE_ARGS=
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set _SKIP=2
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:win9xME_args_slurp
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if "x%~1" == "x" goto execute
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set CMD_LINE_ARGS=%*
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:execute
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@rem Setup the command line
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set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
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@rem Execute Gradle
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"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
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:end
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@rem End local scope for the variables with windows NT shell
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if "%ERRORLEVEL%"=="0" goto mainEnd
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:fail
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rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
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rem the _cmd.exe /c_ return code!
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if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
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exit /b 1
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:mainEnd
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if "%OS%"=="Windows_NT" endlocal
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:omega

‎settings.gradle‎

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rootProject.name = 'wechatpay-apache-httpclient'
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