安卓阿里oss简易的文件上传

Android

记录一次使用阿里oss的文件上传功能，简易版
配合okhttp3实现，没使用阿里配套的sdk

文件上传有PUT和POST，这里使用的是PUT

依赖

implementation("com.squareup.okhttp3:okhttp:4.8.0")

生成GMT格式时间

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private fun getGMTDate(): String {
    val cd = Calendar.getInstance()
    val sdf = SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss 'GMT'", Locale.US)
    sdf.timeZone = TimeZone.getTimeZone("GMT")
    return sdf.format(cd.time)
}

Hmac-Sha1 加密

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private fun sha1(string: String, key: String): ByteArray {
    val algorithm = "HmacSHA1"
    val data = string.toByteArray(Charsets.UTF_8)
    val secretKeySpec = SecretKeySpec(key.toByteArray(Charsets.UTF_8), algorithm)
    val mac = Mac.getInstance(algorithm)
    mac.init(secretKeySpec)
    return mac.doFinal(data)
}

Base64 加密

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private fun base64(byteArray: ByteArray): String {
    return Base64.getEncoder().encodeToString(byteArray)
}

简易的PUT 上传文件

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private const val BaseUrl = "http://BucketName.oss-cn-shenzhen.aliyuncs.com"
private const val BucketName = "test"
private const val AccessKeyID = "*****"
private const val AccessKeySecret = "*****"

object Oss{
    /**
	  * @Description Authorization 签名
 	  * @author lecoler
      * @param date:String GMT格式的时间
      * @param key:String  上传Object的名称
      * @return String     签名
   	**/
    private fun sign(date: String, key: String): String {
        val value = "PUT\n\napplication/octet-stream\n$date\n/$BucketName/$key"
        return base64(sha1(value, AccessKeySecret))
    }

    /**
	  * @Description 上传文件
 	  * @author lecoler
      * @param file:File    需要上传的文体
      * @param key:String   上传Object的名称。
      *                     如果名称包含路径，例如a/b/c/b.jpg，则OSS会自动创建相应的文件夹。
   	**/
    fun upload(file: File, key: String) {
        val GMT = getGMTDate()
        val fileBody = RequestBody.create("application/octet-stream".toMediaTypeOrNull(), file)

        // 新建请求
        val client = OkHttpClient()
        client.newCall(
            Request.Builder()
            .url("$BaseUrl/$key")
            .method("PUT", fileBody)
            .addHeader("Date", GMT)
            .addHeader("Authorization", "OSS $AccessKeyID:${sign(GMT, key)}")
            .build()
        )
        // 发送请求
        .enqueue(object : Callback {
            override fun onFailure(call: Call, e: IOException) {
                Log.e("OSS","OSS PutObject 上传报错：${e.message}")
            }

            override fun onResponse(call: Call, response: Response) {
                Log.i("OSS",response.toString())
            }
        })
    }
}

DOME

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val file = File("abc.txt")
Oss.upload(file,"Android/20200916/abc.txt")