uniapp使用临时签名上传腾讯云oss对象储存方案，支持小程序、app、h5；
前端不依赖腾讯云SDK工具类；
后端使用python实现，需要安装qcloud-python-sts；
其中计算文件md5值使用了条件编译，因为每个环境获取ArrayBuffer方案不一样都不兼容；
pip install qcloud- python- sts== 3.1 .6
官方方案小程序SDK，但是小程序SDK在APP环境由于无法获取file://类型地址的文件； 官方方案JS-SDK，此方案由于要使用file对象然而APP端无法使用Blob工具类； import SparkMD5 from "spark-md5" ;
import { api_getBucketAndRegionSelf
} from "@/api/common" ;
import { OSS_BASE_URL
} from '. . /config';
async function putObjectAutoPath ( keyPath, file) { console. log ( "getMD5FileName" ) try { console. log ( "getMD5FileName" ) const md5FileName = await getMD5FileName ( file) ; const datePath = getDatePath ( ) ; const uploadPath = `${ datePath} ${ keyPath. trim ( ) ? `${ keyPath. trim ( ) } / ` : ''} ${ md5FileName} `; console. log ( "上传路径为：" + uploadPath) ; console. log ( "图片路径=>" + file) ; const res = await api_getBucketAndRegionSelf ( uploadPath) ; console. log ( res) const formData = { key: res. data. cosKey, policy: res. data. policy, success_action_status: 200 , 'q- sign- algorithm': res. data. qSignAlgorithm, 'q-ak' : res. data. qAk, 'q- key- time': res. data. qKeyTime, 'q- signature': res. data. qSignature, 'x- cos- security- token': res. data. securityToken} ; const uploadResult = await uploadFile ( 'https: / / ' + res. data. cosHost, file, formData) ; console. log ( '上传成功:' , uploadResult) ; return OSS_BASE_URL + res. data. cosKey; } catch ( error) { console. error ( '上传失败:' , error) ; throw error; }
}
function getDatePath ( ) { const date = new Date ( ) ; const year = date. getFullYear ( ) ; const month = String ( date. getMonth ( ) + 1 ) . padStart ( 2 , "0" ) ; const day = String ( date. getDate ( ) ) . padStart ( 2 , "0" ) ; return `/ ${ year} / ${ month} / ${ day} / `;
}
function calculateMD5 ( file) { return new Promise ( ( resolve, reject) = > { console. log ( "执行md5值计算H5" , file) ; const xhr = new XMLHttpRequest ( ) ; xhr. open ( 'GET' , file, true ) ; xhr. responseType = 'blob' ; xhr. onload = function ( ) { if ( xhr. status == = 200 ) { const blob = xhr. response; const reader = new FileReader ( ) ; reader. onload = ( e) = > { const binary = e. target. result; const spark = new SparkMD5. ArrayBuffer ( ) ; spark. append ( binary) ; resolve ( spark. end ( ) ) ; } ; reader. onerror = reject; reader. readAsArrayBuffer ( blob) ; } else { reject ( new Error ( 'Failed to fetch blob') ) ; } } ; xhr. onerror = reject; xhr. send ( ) ; console. log ( "执行md5值计算MP" ) ; const fs = uni. getFileSystemManager ( ) ; fs. readFile ( { filePath: file, encoding: 'base64' , success: ( res) = > { const binary = uni. base64ToArrayBuffer ( res. data) ; const spark = new SparkMD5. ArrayBuffer ( ) ; spark. append ( binary) ; resolve ( spark. end ( ) ) ; } , fail: reject, } ) ; console. log ( "执行md5值计算APP" ) ; plus. io. resolveLocalFileSystemURL ( file, ( entry) = > { entry. file ( ( fileObj) = > { const reader = new plus. io. FileReader( ) ; reader. readAsDataURL ( file) ; reader. onloadend = ( evt) = > { const binary = uni. base64ToArrayBuffer ( evt. target. result) ; const spark = new SparkMD5. ArrayBuffer ( ) ; spark. append ( binary) ; resolve ( spark. end ( ) ) ; } ; reader. onerror = reject; } ) ; } , reject) ; } ) ;
}
async function getMD5FileName ( file) { const md5 = await calculateMD5 ( file) ; console. log ( md5) return ; const fileType = file. substring ( file. lastIndexOf ( "." ) ) ; return `${ md5} ${ fileType} `;
}
function uploadFile ( url, filePath, formData) { return new Promise ( ( resolve, reject) = > { uni. uploadFile ( { url: url, filePath: filePath, name: 'file' , formData: formData, success: ( res) = > { if ( res. statusCode == = 200 ) { resolve ( res) ; } else { reject ( new Error ( `上传失败，状态码：${ res. statusCode} , 响应信息：${ res. data} `) ) ; } } , error: ( err) = > { console. log ( "图片上传失败=》" + res) reject ( err) ; } , } ) ; } ) ;
}
export { putObjectAutoPath
} ;
import jsonfrom sts. sts import Sts
import hashlib
import hmac
import base64
import time
from datetime import datetime, timedelta
secret_id = ''
secret_key = ''
bucket = ''
region = '' def get_temporary_credential ( ) : """获取临时密钥:return:""" config = { 'duration_seconds' : 1800 , 'secret_id' : secret_id, 'secret_key' : secret_key, 'bucket' : bucket, 'region' : region, 'allow_prefix' : [ '*' ] , 'allow_actions' : [ 'name/cos:PutObject' , 'name/cos:PostObject' , 'name/cos:InitiateMultipartUpload' , 'name/cos:ListMultipartUploads' , 'name/cos:ListParts' , 'name/cos:UploadPart' , 'name/cos:CompleteMultipartUpload' ] , } try : sts = Sts( config) response = sts. get_credential( ) print ( response) response[ 'bucket' ] = bucketresponse[ 'region' ] = regionreturn responseexcept Exception as e: raise Exception( "腾讯OSS临时密钥获取异常！" ) def get_bucketAndRegion ( ) : """获取bucket 桶id 和region地域:return:""" data = { "bucket" : bucket, "region" : region} return datadef get_temporary_credential_self_upload ( keyPath) : """获取腾讯云oss凭证 适用于POST上传请求【不依赖腾讯SDK】""" credentials_data = get_temporary_credential( ) . get( "credentials" ) tmp_secret_id = credentials_data. get( "tmpSecretId" ) tmp_secret_key = credentials_data. get( "tmpSecretKey" ) session_token = credentials_data. get( "sessionToken" ) cos_host = f" { bucket} .cos. { region} .myqcloud.com" = keyPathnow = int ( time. time( ) ) exp = now + 900 q_key_time = f" { now} ; { exp} " = 'sha1' policy = { 'expiration' : ( datetime. utcfromtimestamp( exp) ) . isoformat( ) + 'Z' , 'conditions' : [ { 'q-sign-algorithm' : q_sign_algorithm} , { 'q-ak' : tmp_secret_id} , { 'q-sign-time' : q_key_time} , { 'bucket' : bucket} , { 'key' : cos_key} , ] } policy_encoded = base64. b64encode( json. dumps( policy) . encode( ) ) . decode( ) sign_key = hmac. new( tmp_secret_key. encode( ) , q_key_time. encode( ) , hashlib. sha1) . hexdigest( ) string_to_sign = hashlib. sha1( json. dumps( policy) . encode( ) ) . hexdigest( ) q_signature = hmac. new( sign_key. encode( ) , string_to_sign. encode( ) , hashlib. sha1) . hexdigest( ) return { 'cosHost' : cos_host, 'cosKey' : cos_key, 'policy' : policy_encoded, 'qSignAlgorithm' : q_sign_algorithm, 'qAk' : tmp_secret_id, 'qKeyTime' : q_key_time, 'qSignature' : q_signature, 'securityToken' : session_token }
![[数据结构] --- 树](https://img-blog.csdnimg.cn/direct/198d2befdee549009a4311420b120cdf.png)
