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现在公网ip资源越来越珍贵，所以多域名监听的应用非常广泛！所谓多域名监听就是用一个端口，比如80或者443，监听多个入口域名！最常见的方法如下：
server {
listen 443 ssl;
server_name xxx.xxx.cn;
ssl_certificate ssl/server.pem;
ssl_certificate_key ssl/server.key;
......
}
今天我们来看看小程序开发过程中的常见问题：
1.如何在nginx同一端口同时监听多个域名？
在启用新的域名的时候，只需要另启一个server配置文件，丢在vhosts目录下即可，不会报端口被占，这个维护nginx的大部分人都知道。但是，这里有个地方要注意：不能跨nginx实例。很多同事习惯在同一虚机或者云主机下安装多个nginx实例，如果你在实例1里面用了某个端口，再在实例2里面用这个端口绑不同域名，那对不起了，报错妥妥的出来：
nginx: [emerg] bind() to 0.0.0.0:xxxx failed (98: Address already in use)
nginx: [emerg] still could not bind()
个人建议：不在同一台虚机或者云主机下安装多个nginx实例。
2.http和https如何同时监听？
这种需求还是挺多的，有时候我们的证书需要安装在A10或者F5这类硬负载均衡上，此时，DMZ区的服务器不需要安装证书，只需要监听http端口即可。但与此同时，内网dns直接将A地址指到了服务器，此时又需要在服务器上安装证书。这种场景，就需要服务器同时对http和https端口进行监听，监听https口是为了解析内网https域名，监听http口是为了反向代理从DMZ区过来的http请求。如此，可实现内外网https域名统一。
最常见的配置如下
server {
listen 8080;
listen 443 ssl;
server_name xxx.xxx.cn;;
ssl_certificate ssl/server.pem;
ssl_certificate_key ssl/server.key;
......
}
3.中文转码的MD5加密的常见方法
var rotateLeft = function(lValue, iShiftBits) {
return(lValue >> (32 - iShiftBits));
}
var addUnsigned = function(lX, lY) {
var lX4, lY4, lX8, lY8, lResult;
lX8 = (lX & 0x80000000);
lY8 = (lY & 0x80000000);
lX4 = (lX & 0x40000000);
lY4 = (lY & 0x40000000);
lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF);
if(lX4 & lY4) return(lResult ^ 0x80000000 ^ lX8 ^ lY8);
if(lX4 | lY4) {
if(lResult & 0x40000000) return(lResult ^ 0xC0000000 ^ lX8 ^ lY8);
else return(lResult ^ 0x40000000 ^ lX8 ^ lY8);
} else {
return(lResult ^ lX8 ^ lY8);
}
}
var F = function(x, y, z) {
return(x & y) | ((~x) & z);
}
var G = function(x, y, z) {
return(x & z) | (y & (~z));
}
var H = function(x, y, z) {
return(x ^ y ^ z);
}
var I = function(x, y, z) {
return(y ^ (x | (~z)));
}
var FF = function(a, b, c, d, x, s, ac) {
a = addUnsigned(a, addUnsigned(addUnsigned(F(b, c, d), x), ac));
return addUnsigned(rotateLeft(a, s), b);
};
var GG = function(a, b, c, d, x, s, ac) {
a = addUnsigned(a, addUnsigned(addUnsigned(G(b, c, d), x), ac));
return addUnsigned(rotateLeft(a, s), b);
};
var HH = function(a, b, c, d, x, s, ac) {
a = addUnsigned(a, addUnsigned(addUnsigned(H(b, c, d), x), ac));
return addUnsigned(rotateLeft(a, s), b);
};
var II = function(a, b, c, d, x, s, ac) {
a = addUnsigned(a, addUnsigned(addUnsigned(I(b, c, d), x), ac));
return addUnsigned(rotateLeft(a, s), b);
};
var convertToWordArray = function(string) {
var lWordCount;
var lMessageLength = string.length;
var lNumberOfWordsTempOne = lMessageLength + 8;
var lNumberOfWordsTempTwo = (lNumberOfWordsTempOne - (lNumberOfWordsTempOne % 64)) / 64;
var lNumberOfWords = (lNumberOfWordsTempTwo + 1) * 16;
var lWordArray = Array(lNumberOfWords - 1);
var lBytePosition = 0;
var lByteCount = 0;
while(lByteCount >> 29;
return lWordArray;
};
var wordToHex = function(lValue) {
var WordToHexValue = "",
WordToHexValueTemp = "",
lByte, lCount;
for(lCount = 0; lCount >> (lCount * 8)) & 255;
WordToHexValueTemp = "0" + lByte.toString(16);
WordToHexValue = WordToHexValue + WordToHexValueTemp.substr(WordToHexValueTemp.length - 2, 2);
}
return WordToHexValue;
};
var uTF8Encode = function(string) {
string = string.replace(/
/g, "
");
var output = "";
for(var n = 0; n 127) && (c > 6) | 192);
output += String.fromCharCode((c & 63) | 128);
} else {
output += String.fromCharCode((c >> 12) | 224);
output += String.fromCharCode(((c >> 6) & 63) | 128);
output += String.fromCharCode((c & 63) | 128);
}
}
return output;
};
function md5(string) {
var x = Array();
var k, AA, BB, CC, DD, a, b, c, d;
var S11 = 7,
S12 = 12,
S13 = 17,
S14 = 22;
var S21 = 5,
S22 = 9,
S23 = 14,
S24 = 20;
var S31 = 4,
S32 = 11,
S33 = 16,
S34 = 23;
var S41 = 6,
S42 = 10,
S43 = 15,
S44 = 21;
string = uTF8Encode(string);
x = convertToWordArray(string);
a = 0x67452301;
b = 0xEFCDAB89;
c = 0x98BADCFE;
d = 0x10325476;
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# 小程序开发中如何在nginx同一端口同时监听多个域名？
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