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我打算從使用限制版Groovy的M2M雲中調用API網關，並且無法使用外部SDK。 所以我檢查了實現的描述和一些代碼示例。如何使用Groovy調用Amazon API網關
- 我發現文檔 - documentation
- 與樣品上的Python - Python example
我試圖實現獲取方法對純Groovy的，但它並不活像，讓我403錯誤。這意味着我的訪問實施有錯誤。：
import javax.crypto.Mac
import javax.crypto.spec.SecretKeySpec
import java.security.InvalidKeyException
import java.security.MessageDigest
import org.apache.commons.httpclient.HttpClient
import org.apache.commons.httpclient.methods.GetMethod
import org.apache.commons.httpclient.Header
import groovy.json.JsonSlurper
import java.text.SimpleDateFormat
def method = 'GET'
def service = 'ec2'
def host = 'ec2.amazonaws.com'
def region = 'us-east-1'
def endpoint = 'https://ec2.amazonaws.com'
def request_parameters = 'Action=DescribeRegions&Version=2013-10-15'
def hmac_sha256(byte[] secretKey, String data) {
try {
Mac mac = Mac.getInstance("HmacSHA256")
SecretKeySpec secretKeySpec = new SecretKeySpec(secretKey, "HmacSHA256")
mac.init(secretKeySpec)
byte[] digest = mac.doFinal(data.getBytes())
return digest
} catch (InvalidKeyException e) {
throw new RuntimeException("Invalid key exception while converting to HMac SHA256")
}
}
def hmac_sha256Hex(byte[] secretKey, String data) {
def result = hmac_sha256(secretKey, data)
return result.encodeHex()
}
def getSignatureKey(key, dateStamp, regionName, serviceName){
def kDate = hmac_sha256(('AWS4' + key).getBytes(), dateStamp)
def kRegion = hmac_sha256(kDate, regionName)
def kService = hmac_sha256(kRegion, serviceName)
def kSigning = hmac_sha256(kService, 'aws4_request')
return kSigning
}
def getHexDigest(text){
def md = MessageDigest.getInstance("SHA-256")
md.update(text.getBytes())
return md.digest().encodeHex()
}
def access_key = 'Access Key'
def secret_key = 'Secret Access Key'
def now = new Date()
def amzFormat = new SimpleDateFormat("yyyyMMdd'T'HHmmss'Z'")
def stampFormat = new SimpleDateFormat("yyyyMMdd")
def amzDate = amzFormat.format(now)
def dateStamp = stampFormat.format(now)
def canonical_uri = '/'
def canonical_querystring = request_parameters
def canonical_headers = 'host:' + host + '\n' + 'x-amz-date:' + amzDate + '\n'
def signed_headers = 'host;x-amz-date'
def payload_hash = getHexDigest("")
def canonical_request = method + '\n' + canonical_uri + '\n' + canonical_querystring + '\n' + canonical_headers + '\n' + signed_headers + '\n' + payload_hash
def algorithm = 'AWS4-HMAC-SHA256'
def credential_scope = dateStamp + '/' + region + '/' + service + '/' + 'aws4_request'
def hash_canonical_request = getHexDigest(canonical_request)
def string_to_sign = algorithm + '\n' + amzDate + '\n' + credential_scope + '\n' + hash_canonical_request
def signing_key = getSignatureKey(secret_key, dateStamp, region, service)
def signature = hmac_sha256Hex(signing_key, string_to_sign)
def authorization_header = algorithm + ' ' + 'Credential=' + access_key + '/' + credential_scope + ', ' + 'SignedHeaders=' + signed_headers + ', ' + 'Signature=' + signature
def request_url = endpoint + '?' + canonical_querystring
def httpClient = new HttpClient()
def get = new GetMethod('https://xxxxx.execute-api.us-east-1.amazonaws.com/Method/id000/')
get.setRequestHeader(new Header("x-amz-date", amzDate))
get.setRequestHeader(new Header("Authorization", authorization_header))
int statusCode = httpClient.executeMethod(get)
if(statusCode >= 200 && statusCode < 300){
def slurper = new JsonSlurper()
def response = slurper.parseText(get.getResponseBodyAsString())
logger.debug response
logger.debug response?.Id
}else{
logger.debug statusCode
}
有人能指出我在哪裏做錯了嗎？
你是什麼意思它沒有按預期工作？ – thesonyman101
@ thesonyman101抱歉不清楚的問題，我的意思是我的迴應是403，並且請求沒有通過驗證。 – RredCat