com.aliyun.sdk.gateway.sls.internal.HttpUtil Maven / Gradle / Ivy

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package com.aliyun.sdk.gateway.sls.internal;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.Map;

public class HttpUtil {
    /**
     * Encode a URL segment with special chars replaced.
     */
    public static String urlEncode(String value, String encoding) {
        if (value == null) {
            return "";
        }
        try {
            String encoded = URLEncoder.encode(value, encoding);
            return encoded.replace("+", "%20").replace("*", "%2A").replace("~", "%7E").replace("/", "%2F");
        } catch (UnsupportedEncodingException e) {
            throw new IllegalArgumentException("FailedToEncodeUri", e);
        }
    }

    /**
     * Encode request parameters to URL segment.
     */
    public static String paramToQueryString(Map params, String charset) {

        if (params == null || params.isEmpty()) {
            return "";
        }

        StringBuilder paramString = new StringBuilder();
        boolean first = true;
        for (Map.Entry p : params.entrySet()) {
            String key = p.getKey();
            String value = p.getValue();

            if (!first) {
                paramString.append("&");
            }

            // Urlencode each request parameter
            paramString.append(urlEncode(key, charset));
            if (value != null) {
                paramString.append("=").append(urlEncode(value, charset));
            }

            first = false;
        }

        return paramString.toString();
    }
}