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113 lines
2.4 KiB
Go
Executable File
113 lines
2.4 KiB
Go
Executable File
package alils
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import (
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"crypto/hmac"
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"crypto/sha1"
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"encoding/base64"
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"fmt"
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"net/url"
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"sort"
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"strings"
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"time"
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)
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// GMT location
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var gmtLoc = time.FixedZone("GMT", 0)
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// NowRFC1123 returns now time in RFC1123 format with GMT timezone,
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// eg. "Mon, 02 Jan 2006 15:04:05 GMT".
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func nowRFC1123() string {
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return time.Now().In(gmtLoc).Format(time.RFC1123)
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}
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// signature calculates a request's signature digest.
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func signature(project *LogProject, method, uri string,
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headers map[string]string) (digest string, err error) {
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var contentMD5, contentType, date, canoHeaders, canoResource string
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var slsHeaderKeys sort.StringSlice
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// SignString = VERB + "\n"
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// + CONTENT-MD5 + "\n"
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// + CONTENT-TYPE + "\n"
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// + DATE + "\n"
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// + CanonicalizedSLSHeaders + "\n"
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// + CanonicalizedResource
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if val, ok := headers["Content-MD5"]; ok {
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contentMD5 = val
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}
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if val, ok := headers["Content-Type"]; ok {
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contentType = val
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}
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date, ok := headers["Date"]
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if !ok {
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err = fmt.Errorf("Can't find 'Date' header")
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return
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}
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// Calc CanonicalizedSLSHeaders
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slsHeaders := make(map[string]string, len(headers))
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for k, v := range headers {
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l := strings.TrimSpace(strings.ToLower(k))
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if strings.HasPrefix(l, "x-sls-") {
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slsHeaders[l] = strings.TrimSpace(v)
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slsHeaderKeys = append(slsHeaderKeys, l)
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}
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}
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sort.Sort(slsHeaderKeys)
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for i, k := range slsHeaderKeys {
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canoHeaders += k + ":" + slsHeaders[k]
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if i+1 < len(slsHeaderKeys) {
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canoHeaders += "\n"
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}
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}
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// Calc CanonicalizedResource
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u, err := url.Parse(uri)
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if err != nil {
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return
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}
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canoResource += url.QueryEscape(u.Path)
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if u.RawQuery != "" {
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var keys sort.StringSlice
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vals := u.Query()
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for k, _ := range vals {
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keys = append(keys, k)
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}
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sort.Sort(keys)
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canoResource += "?"
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for i, k := range keys {
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if i > 0 {
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canoResource += "&"
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}
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for _, v := range vals[k] {
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canoResource += k + "=" + v
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}
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}
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}
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signStr := method + "\n" +
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contentMD5 + "\n" +
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contentType + "\n" +
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date + "\n" +
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canoHeaders + "\n" +
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canoResource
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// Signature = base64(hmac-sha1(UTF8-Encoding-Of(SignString)，AccessKeySecret))
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mac := hmac.New(sha1.New, []byte(project.AccessKeySecret))
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_, err = mac.Write([]byte(signStr))
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if err != nil {
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return
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}
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digest = base64.StdEncoding.EncodeToString(mac.Sum(nil))
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return
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}
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