fix pcre downloa url

Author: zhuizhuhaomeng

.travis.yml

@@ -54,8 +54,8 @@ before_install:
   - sudo DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends openresty-pcre2 openresty-openssl3 openresty-pcre2-dev openresty-openssl3-dev
 
 install:
-  - if [ ! -f download-cache/pcre2-$PCRE2_VER.tar.gz ]; then wget -P download-cache https://downloads.sourceforge.net/project/pcre/pcre2/${PCRE2_VER}/pcre2-${PCRE2_VER}.tar.gz; fi
-  - if [ ! -f download-cache/openssl-$OPENSSL_VER.tar.gz ]; then wget -P download-cache https://www.openssl.org/source/openssl-$OPENSSL_VER.tar.gz; fi
+  - if [ -n "$PCRE2_VER" ] && [ ! -f download-cache/pcre2-$PCRE2_VER.tar.gz ]; then wget -P download-cache https://github.com/PCRE2Project/pcre2/releases/download/pcre2-${PCRE2_VER}/pcre2-${PCRE2_VER}.tar.gz; fi
+  - if [ -n "$OPENSSL_VER" ] && [ ! -f download-cache/openssl-$OPENSSL_VER.tar.gz ]; then wget -P download-cache https://github.com/openssl/openssl/releases/download/openssl-$OPENSSL_VER/openssl-$OPENSSL_VER.tar.gz || wget -P download-cache https://www.openssl.org/source/openssl-$OPENSSL_VER.tar.gz || wget -P download-cache https://www.openssl.org/source/old/${OPENSSL_VER//[a-z]/}/openssl-$OPENSSL_VER.tar.gz; fi
   - git clone https://github.com/openresty/openresty-devel-utils.git
   - git clone https://github.com/openresty/lua-cjson.git
   - git clone https://github.com/openresty/openresty.git ../openresty