com.aliyun.sdk.gateway.eiam.dev.auth.RoaSignatureComposer Maven / Gradle / Ivy

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package com.aliyun.sdk.gateway.eiam.dev.auth;

import com.aliyun.core.http.HttpMethod;
import com.aliyun.core.utils.StringUtils;

import java.util.*;

public class RoaSignatureComposer {
    private final static String SEPARATOR = "&";
    private final static String ACCEPT = "accept";
    private final static String CONTENT_MD5 = "content-md5";
    private final static String CONTENT_TYPE = "content-type";
    private final static String DATE = "date";
    private final static String prefix = "x-acs-";

    public static String composeStringToSign(HttpMethod method, Map params,
                                             Map headers, String pathname) {
        String accept = headers.get(ACCEPT) == null ? StringUtils.EMPTY : headers.get(ACCEPT);
        String contentMD5 = headers.get(CONTENT_MD5) == null ? StringUtils.EMPTY : headers.get(CONTENT_MD5);
        String contentType = headers.get(CONTENT_TYPE) == null ? StringUtils.EMPTY : headers.get(CONTENT_TYPE);
        String date = headers.get(DATE) == null ? StringUtils.EMPTY : headers.get(DATE);
        String header = method + "\n" + accept + "\n" + contentMD5 + "\n" + contentType + "\n" + date + "\n";
        String canonicalizedHeaders = buildCanonicalizedHeaders(headers);
        String canonicalizedResource = buildCanonicalizedResource(pathname, params);
        return header + canonicalizedHeaders + canonicalizedResource;
    }

    private static String buildCanonicalizedHeaders(Map headers) {
        Set keys = headers.keySet();
        List canonicalizedKeys = new ArrayList<>();
        for (String key : keys) {
            if (key.startsWith(prefix)) {
                canonicalizedKeys.add(key);
            }
        }
        Collections.sort(canonicalizedKeys);
        StringBuilder canonicalizedHeaders = new StringBuilder();
        for (String key : canonicalizedKeys) {
            canonicalizedHeaders.append(key);
            canonicalizedHeaders.append(":");
            canonicalizedHeaders.append(headers.get(key).trim());
            canonicalizedHeaders.append("\n");
        }
        return canonicalizedHeaders.toString();
    }

    private static String buildCanonicalizedResource(String pathname, Map params) {
        if (params.size() <= 0) {
            return pathname;
        }
        String[] keys = params.keySet().toArray(new String[params.size()]);
        StringBuilder queryString = new StringBuilder(pathname);
        queryString.append("?");
        Arrays.sort(keys);
        for (int i = 0; i < keys.length; i++) {
            queryString.append(keys[i]);
            if (!StringUtils.isEmpty(params.get(keys[i]))) {
                queryString.append("=");
                queryString.append(params.get(keys[i]));
            }
            queryString.append(SEPARATOR);
        }
        return queryString.length() > 0 ? queryString.deleteCharAt(queryString.length() - 1).toString() : StringUtils.EMPTY;
    }
}