最近在做一个项目，需要用到http get post等
需求分析需要做到同步和异步，异步请求的返回以可选的回调通知的方式进行。
本人以Linux为例，一步一步的来实现。
- 配置并且编译libcurl
我以在Linux底下的交叉编译举例。
libcurl源码下载: http://curl.haxx.se/download.html
配置libcurl支持https和zlib压缩，必须需要openssl和zlib库
openssl库源码下载: http://www.openssl.org/source/。下载1.02a以上的版本，避开心脏出血漏洞。
zlib源码下载：http://www.zlib.net/。下载最新版本代码。
新建文件夹carbon。源码解压至目录carbon。
1.1 配置openssl并且编译
配置和编译脚本:1 #!/bin/bash 2 # Cross-compile environment for Android on ARMv7 and x86 3 # 4 # Contents licensed under the terms of the OpenSSL license 5 # http://www.openssl.org/source/license.html 6 # 7 # See http://wiki.openssl.org/index.php/FIPS_Library_and_Android 8 # and http://wiki.openssl.org/index.php/Android 9 10 ##################################################################### 11 12 # Set ANDROID_NDK_ROOT to you NDK location. For example, 13 # /opt/android-ndk-r8e or /opt/android-ndk-r9. This can be done in a 14 # login script. If ANDROID_NDK_ROOT is not specified, the script will 15 # try to pick it up with the value of _ANDROID_NDK_ROOT below. If 16 # ANDROID_NDK_ROOT is set, then the value is ignored. 17 # _ANDROID_NDK="android-ndk-r8e" 18 #_ANDROID_NDK="android-ndk-r9" 19 _ANDROID_NDK="android-ndk-r10" 20 ANDROID_NDK_ROOT=$HOME/ndk/android-ndk-r10d 21 # Set _ANDROID_EABI to the EABI you want to use. You can find the 22 # list in $ANDROID_NDK_ROOT/toolchains. This value is always used. 23 # _ANDROID_EABI="x86-4.6" 24 # _ANDROID_EABI="arm-linux-androideabi-4.6" 25 _ANDROID_EABI="arm-linux-androideabi-4.8" 26 export ROOTDIR="${PWD}" 27 28 # Set _ANDROID_ARCH to the architecture you are building for. 29 # This value is always used. 30 # _ANDROID_ARCH=arch-x86 31 _ANDROID_ARCH=arch-arm 32 33 # Set _ANDROID_API to the API you want to use. You should set it 34 # to one of: android-14, android-9, android-8, android-14, android-5 35 # android-4, or android-3. You can't set it to the latest (for 36 # example, API-17) because the NDK does not supply the platform. At 37 # Android 5.0, there will likely be another platform added (android-22?). 38 # This value is always used. 39 # _ANDROID_API="android-14" 40 # _ANDROID_API="android-18" 41 # _ANDROID_API="android-19" 42 _ANDROID_API="android-5" 43 44 ##################################################################### 45 46 # If the user did not specify the NDK location, try and pick it up. 47 # We expect something like ANDROID_NDK_ROOT=/opt/android-ndk-r8e 48 # or ANDROID_NDK_ROOT=/usr/local/android-ndk-r8e. 49 50 if [ -z "$ANDROID_NDK_ROOT" ]; then 51 52 _ANDROID_NDK_ROOT="" 53 if [ -z "$_ANDROID_NDK_ROOT" ] && [ -d "/usr/local/$_ANDROID_NDK" ]; then 54 _ANDROID_NDK_ROOT="/usr/local/$_ANDROID_NDK" 55 fi 56 57 if [ -z "$_ANDROID_NDK_ROOT" ] && [ -d "/opt/$_ANDROID_NDK" ]; then 58 _ANDROID_NDK_ROOT="/opt/$_ANDROID_NDK" 59 fi 60 61 if [ -z "$_ANDROID_NDK_ROOT" ] && [ -d "$HOME/$_ANDROID_NDK" ]; then 62 _ANDROID_NDK_ROOT="$HOME/$_ANDROID_NDK" 63 fi 64 65 if [ -z "$_ANDROID_NDK_ROOT" ] && [ -d "$PWD/$_ANDROID_NDK" ]; then 66 _ANDROID_NDK_ROOT="$PWD/$_ANDROID_NDK" 67 fi 68 69 # If a path was set, then export it 70 if [ ! -z "$_ANDROID_NDK_ROOT" ] && [ -d "$_ANDROID_NDK_ROOT" ]; then 71 export ANDROID_NDK_ROOT="$_ANDROID_NDK_ROOT" 72 fi 73 fi 74 75 # Error checking 76 # ANDROID_NDK_ROOT should always be set by the user (even when not running this script) 77 # http://groups.google.com/group/android-ndk/browse_thread/thread/a998e139aca71d77 78 if [ -z "$ANDROID_NDK_ROOT" ] || [ ! -d "$ANDROID_NDK_ROOT" ]; then 79 echo "Error: ANDROID_NDK_ROOT is not a valid path. Please edit this script." 80 # echo "$ANDROID_NDK_ROOT" 81 # exit 1 82 fi 83 84 # Error checking 85 if [ ! -d "$ANDROID_NDK_ROOT/toolchains" ]; then 86 echo "Error: ANDROID_NDK_ROOT/toolchains is not a valid path. Please edit this script." 87 # echo "$ANDROID_NDK_ROOT/toolchains" 88 # exit 1 89 fi 90 91 # Error checking 92 if [ ! -d "$ANDROID_NDK_ROOT/toolchains/$_ANDROID_EABI" ]; then 93 echo "Error: ANDROID_EABI is not a valid path. Please edit this script." 94 # echo "$ANDROID_NDK_ROOT/toolchains/$_ANDROID_EABI" 95 # exit 1 96 fi 97 98 ##################################################################### 99 100 # Based on ANDROID_NDK_ROOT, try and pick up the required toolchain. We expect something like: 101 # /opt/android-ndk-r83/toolchains/arm-linux-androideabi-4.7/prebuilt/linux-x86_64/bin 102 # Once we locate the toolchain, we add it to the PATH. Note: this is the 'hard way' of 103 # doing things according to the NDK documentation for Ice Cream Sandwich. 104 # https://android.googlesource.com/platform/ndk/+/ics-mr0/docs/STANDALONE-TOOLCHAIN.html 105 106 ANDROID_TOOLCHAIN="" 107 for host in "linux-x86_64" "linux-x86" "darwin-x86_64" "darwin-x86" 108 do 109 if [ -d "$ANDROID_NDK_ROOT/toolchains/$_ANDROID_EABI/prebuilt/$host/bin" ]; then 110 ANDROID_TOOLCHAIN="$ANDROID_NDK_ROOT/toolchains/$_ANDROID_EABI/prebuilt/$host/bin" 111 break 112 fi 113 done 114 115 # Error checking 116 if [ -z "$ANDROID_TOOLCHAIN" ] || [ ! -d "$ANDROID_TOOLCHAIN" ]; then 117 echo "Error: ANDROID_TOOLCHAIN is not valid. Please edit this script." 118 # echo "$ANDROID_TOOLCHAIN" 119 # exit 1 120 fi 121 122 case $_ANDROID_ARCH in 123 arch-arm) 124 ANDROID_TOOLS="arm-linux-androideabi-gcc arm-linux-androideabi-ranlib arm-linux-androideabi-ld" 125 ;; 126 arch-x86) 127 ANDROID_TOOLS="i686-linux-android-gcc i686-linux-android-ranlib i686-linux-android-ld" 128 ;; 129 *) 130 echo "ERROR ERROR ERROR" 131 ;; 132 esac 133 134 for tool in $ANDROID_TOOLS 135 do 136 # Error checking 137 if [ ! -e "$ANDROID_TOOLCHAIN/$tool" ]; then 138 echo "Error: Failed to find $tool. Please edit this script." 139 # echo "$ANDROID_TOOLCHAIN/$tool" 140 # exit 1 141 fi 142 done 143 144 # Only modify/export PATH if ANDROID_TOOLCHAIN good 145 if [ ! -z "$ANDROID_TOOLCHAIN" ]; then 146 export ANDROID_TOOLCHAIN="$ANDROID_TOOLCHAIN" 147 export PATH="$ANDROID_TOOLCHAIN":"$PATH" 148 fi 149 150 ##################################################################### 151 152 # For the Android SYSROOT. Can be used on the command line with --sysroot 153 # https://android.googlesource.com/platform/ndk/+/ics-mr0/docs/STANDALONE-TOOLCHAIN.html 154 export ANDROID_SYSROOT="$ANDROID_NDK_ROOT/platforms/$_ANDROID_API/$_ANDROID_ARCH" 155 export SYSROOT="$ANDROID_SYSROOT" 156 export NDK_SYSROOT="$ANDROID_SYSROOT" 157 158 # Error checking 159 if [ -z "$ANDROID_SYSROOT" ] || [ ! -d "$ANDROID_SYSROOT" ]; then 160 echo "Error: ANDROID_SYSROOT is not valid. Please edit this script." 161 # echo "$ANDROID_SYSROOT" 162 # exit 1 163 fi 164 165 ##################################################################### 166 167 # If the user did not specify the FIPS_SIG location, try and pick it up 168 # If the user specified a bad location, then try and pick it up too. 169 if [ -z "$FIPS_SIG" ] || [ ! -e "$FIPS_SIG" ]; then 170 171 # Try and locate it 172 _FIPS_SIG="" 173 if [ -d "/usr/local/ssl/$_ANDROID_API" ]; then 174 _FIPS_SIG=`find "/usr/local/ssl/$_ANDROID_API" -name incore` 175 fi 176 177 if [ ! -e "$_FIPS_SIG" ]; then 178 _FIPS_SIG=`find $PWD -name incore` 179 fi 180 181 # If a path was set, then export it 182 if [ ! -z "$_FIPS_SIG" ] && [ -e "$_FIPS_SIG" ]; then 183 export FIPS_SIG="$_FIPS_SIG" 184 fi 185 fi 186 187 # Error checking. Its OK to ignore this if you are *not* building for FIPS 188 if [ -z "$FIPS_SIG" ] || [ ! -e "$FIPS_SIG" ]; then 189 echo "Error: FIPS_SIG does not specify incore module. Please edit this script." 190 # echo "$FIPS_SIG" 191 # exit 1 192 fi 193 194 ##################################################################### 195 196 # Most of these should be OK (MACHINE, SYSTEM, ARCH). RELEASE is ignored. 197 export MACHINE=armv7 198 export RELEASE=2.6.37 199 export SYSTEM=android 200 export ARCH=arm 201 export CROSS_COMPILE="arm-linux-androideabi-" 202 203 if [ "$_ANDROID_ARCH" == "arch-x86" ]; then 204 export MACHINE=i686 205 export RELEASE=2.6.37 206 export SYSTEM=android 207 export ARCH=x86 208 export CROSS_COMPILE="i686-linux-android-" 209 fi 210 211 # For the Android toolchain 212 # https://android.googlesource.com/platform/ndk/+/ics-mr0/docs/STANDALONE-TOOLCHAIN.html 213 export ANDROID_SYSROOT="$ANDROID_NDK_ROOT/platforms/$_ANDROID_API/$_ANDROID_ARCH" 214 export SYSROOT="$ANDROID_SYSROOT" 215 export NDK_SYSROOT="$ANDROID_SYSROOT" 216 export ANDROID_NDK_SYSROOT="$ANDROID_SYSROOT" 217 export ANDROID_API="$_ANDROID_API" 218 219 # CROSS_COMPILE and ANDROID_DEV are DFW (Don't Fiddle With). Its used by OpenSSL build system. 220 # export CROSS_COMPILE="arm-linux-androideabi-" 221 export ANDROID_DEV="$ANDROID_NDK_ROOT/platforms/$_ANDROID_API/$_ANDROID_ARCH/usr" 222 export HOSTCC=gcc 223 224 VERBOSE=1 225 if [ ! -z "$VERBOSE" ] && [ "$VERBOSE" != "0" ]; then 226 echo "ANDROID_NDK_ROOT: $ANDROID_NDK_ROOT" 227 echo "ANDROID_ARCH: $_ANDROID_ARCH" 228 echo "ANDROID_EABI: $_ANDROID_EABI" 229 echo "ANDROID_API: $ANDROID_API" 230 echo "ANDROID_SYSROOT: $ANDROID_SYSROOT" 231 echo "ANDROID_TOOLCHAIN: $ANDROID_TOOLCHAIN" 232 echo "FIPS_SIG: $FIPS_SIG" 233 echo "CROSS_COMPILE: $CROSS_COMPILE" 234 echo "ANDROID_DEV: $ANDROID_DEV" 235 fi 236 237 cd openssl 238 if [ $# -gt 0 ]; then 239 perl -pi -e 's/install: all install_docs install_sw/install: install_docs install_sw/g' Makefile.org 240 ./config -DOPENSSL_NO_HEARTBEATS no-shared no-ssl2 no-ssl3 no-comp no-hw no-engine --openssldir=${ROOTDIR}/build/openssl 241 fi 242 make depend 243 make && make install