package oss import ( "github.com/denverdino/aliyungo/util" //"log" "net/http" "net/url" "sort" "strings" ) const HeaderOSSPrefix = "x-oss-" var ossParamsToSign = map[string]bool{ "acl": true, "delete": true, "location": true, "logging": true, "notification": true, "partNumber": true, "policy": true, "requestPayment": true, "torrent": true, "uploadId": true, "uploads": true, "versionId": true, "versioning": true, "versions": true, "response-content-type": true, "response-content-language": true, "response-expires": true, "response-cache-control": true, "response-content-disposition": true, "response-content-encoding": true, "bucketInfo": true, } func (client *Client) signRequest(request *request) { query := request.params urlSignature := query.Get("OSSAccessKeyId") != "" headers := request.headers contentMd5 := headers.Get("Content-Md5") contentType := headers.Get("Content-Type") date := "" if urlSignature { date = query.Get("Expires") } else { date = headers.Get("Date") } resource := request.path if request.bucket != "" { resource = "/" + request.bucket + request.path } params := make(url.Values) for k, v := range query { if ossParamsToSign[k] { params[k] = v } } if len(params) > 0 { resource = resource + "?" + util.Encode(params) } canonicalizedResource := resource _, canonicalizedHeader := canonicalizeHeader(headers) stringToSign := request.method + "\n" + contentMd5 + "\n" + contentType + "\n" + date + "\n" + canonicalizedHeader + canonicalizedResource //log.Println("stringToSign: ", stringToSign) signature := util.CreateSignature(stringToSign, client.AccessKeySecret) if query.Get("OSSAccessKeyId") != "" { query.Set("Signature", signature) } else { headers.Set("Authorization", "OSS "+client.AccessKeyId+":"+signature) } } //Have to break the abstraction to append keys with lower case. func canonicalizeHeader(headers http.Header) (newHeaders http.Header, result string) { var canonicalizedHeaders []string newHeaders = http.Header{} for k, v := range headers { if lower := strings.ToLower(k); strings.HasPrefix(lower, HeaderOSSPrefix) { newHeaders[lower] = v canonicalizedHeaders = append(canonicalizedHeaders, lower) } else { newHeaders[k] = v } } sort.Strings(canonicalizedHeaders) var canonicalizedHeader string for _, k := range canonicalizedHeaders { canonicalizedHeader += k + ":" + headers.Get(k) + "\n" } return newHeaders, canonicalizedHeader }