/
temporary_other.go
90 lines (74 loc) · 2.66 KB
/
temporary_other.go
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package obs
import (
"errors"
"fmt"
"strings"
"time"
)
func (obsClient ObsClient) CreateBrowserBasedSignature(input *CreateBrowserBasedSignatureInput) (output *CreateBrowserBasedSignatureOutput, err error) {
if input == nil {
return nil, errors.New("CreateBrowserBasedSignatureInput is nil")
}
params := make(map[string]string, len(input.FormParams))
for key, value := range input.FormParams {
params[key] = value
}
date := time.Now().UTC()
shortDate := date.Format(SHORT_DATE_FORMAT)
longDate := date.Format(LONG_DATE_FORMAT)
credential, _ := getCredential(obsClient.conf.securityProvider.ak, obsClient.conf.region, shortDate)
if input.Expires <= 0 {
input.Expires = 300
}
expiration := date.Add(time.Second * time.Duration(input.Expires)).Format(ISO8601_DATE_FORMAT)
params[PARAM_ALGORITHM_AMZ_CAMEL] = V4_HASH_PREFIX
params[PARAM_CREDENTIAL_AMZ_CAMEL] = credential
params[PARAM_DATE_AMZ_CAMEL] = longDate
if obsClient.conf.securityProvider.securityToken != "" {
if obsClient.conf.signature == SignatureObs {
params[HEADER_STS_TOKEN_OBS] = obsClient.conf.securityProvider.securityToken
} else {
params[HEADER_STS_TOKEN_AMZ] = obsClient.conf.securityProvider.securityToken
}
}
matchAnyBucket := true
matchAnyKey := true
count := 5
if bucket := strings.TrimSpace(input.Bucket); bucket != "" {
params["bucket"] = bucket
matchAnyBucket = false
count--
}
if key := strings.TrimSpace(input.Key); key != "" {
params["key"] = key
matchAnyKey = false
count--
}
originPolicySlice := make([]string, 0, len(params)+count)
originPolicySlice = append(originPolicySlice, fmt.Sprintf("{\"expiration\":\"%s\",", expiration))
originPolicySlice = append(originPolicySlice, "\"conditions\":[")
for key, value := range params {
if _key := strings.TrimSpace(strings.ToLower(key)); _key != "" {
originPolicySlice = append(originPolicySlice, fmt.Sprintf("{\"%s\":\"%s\"},", _key, value))
}
}
if matchAnyBucket {
originPolicySlice = append(originPolicySlice, "[\"starts-with\", \"$bucket\", \"\"],")
}
if matchAnyKey {
originPolicySlice = append(originPolicySlice, "[\"starts-with\", \"$key\", \"\"],")
}
originPolicySlice = append(originPolicySlice, "]}")
originPolicy := strings.Join(originPolicySlice, "")
policy := Base64Encode([]byte(originPolicy))
signature := getSignature(policy, obsClient.conf.securityProvider.sk, obsClient.conf.region, shortDate)
output = &CreateBrowserBasedSignatureOutput{
OriginPolicy: originPolicy,
Policy: policy,
Algorithm: params[PARAM_ALGORITHM_AMZ_CAMEL],
Credential: params[PARAM_CREDENTIAL_AMZ_CAMEL],
Date: params[PARAM_DATE_AMZ_CAMEL],
Signature: signature,
}
return
}