月度归档：2019年08月

android java gzip解压 

    public String decompress(byte[] compressed) throws IOException {
        final int BUFFER_SIZE = 32;
        ByteArrayInputStream is = new ByteArrayInputStream(compressed);
        GZIPInputStream gis = new GZIPInputStream(is, BUFFER_SIZE);
        StringBuilder string = new StringBuilder();
        byte[] data = new byte[BUFFER_SIZE];
        int bytesRead;
        while ((bytesRead = gis.read(data)) != -1) {
            string.append(new String(data, 0, bytesRead));
        }
        gis.close();
        is.close();
        return string.toString();
    }

// 解压
           String cc = "H4sIAAAAAAAAA3s6ddlTVAQAXAODIhIAAAA=";
           try {
               this.decryptedText.setText(this.decompress(Base64.decode(cc.toCharArray())));
           } catch (IOException e) {
               e.printStackTrace();
           }

openssl_private_encrypt 最大只能加密117字符😂

On my PHP5 build, the limit is 117 characters (936 bits, strange number). That’s because public key encryption is CPU intensive, and meant to be used on short values. The idea is to use this function to encrypt a secret key that is in turn used to encrypt data using a more efficient algorithm, such as RC4 or TripleDES.openssl_public_encrypt

nginx: [warn] duplicate MIME type “text/html”

我检查配置文件发现疑似gzip漏写了text/html，加上去后反而报警告了，百度发现：

https://blog.csdn.net/liangyuannao/article/details/21378113

解决办法：去掉下面一行中的“text/html”。

gzip_types  text/plain text/html  text/css application/x-javascript text/xml application/xml application/xml+rss text/javascript;

原因：text/html根本就不需要写的，gzip默认就会压缩它的，只不过以前的nginx版本不提示这个警告而已，新版本的会出这个警告。

laravel 获取真实ip的事项 

# 这个逻辑可以放在中间件里，判断白名单（127.0.0.1或你的其他代理服务器ip）
$ip = $request->ip();
        if (in_array($ip, ['127.0.0.1']))
            $request->setTrustedProxies($request->getClientIps(), Request::HEADER_X_FORWARDED_ALL);

# nginx 配套配置，如果你是nginx转发，按照这个标准来
        proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;


# 获取IP
echo $request->ip();

X-Forwarded-For 相关连接：https://en.wikipedia.org/wiki/X-Forwarded-For