为什么亚马逊SES接受我的get请求，但拒绝我类似结构的帖子请求？

Question

这是我目前用来通过亚马逊的简单电子邮件服务发送电子邮件的获取请求的代码：

import datetime
import hashlib
import hmac
import urllib.parse
import requests


def sign(key, msg):
    return hmac.new(key, msg.encode('utf-8'), hashlib.sha256).digest()


def getSignatureKey(key, dateStamp, regionName, serviceName):
    kDate = sign(('AWS4' + key).encode('utf-8'), dateStamp)
    kRegion = sign(kDate, regionName)
    kService = sign(kRegion, serviceName)
    kSigning = sign(kService, 'aws4_request')
    return kSigning


method = 'GET'
service = 'ses'
host = 'email.us-east-1.amazonaws.com'
region = 'us-east-1'
endpoint = 'https://email.us-east-1.amazonaws.com/'
access_key = 'my_access_key'
secret_key = 'my_secret_key'
my_email = 'my_email_address'

t = datetime.datetime.utcnow()
amz_date = t.strftime('%Y%m%dT%H%M%SZ')
datestamp = t.strftime('%Y%m%d')
canonical_uri = '/'
canonical_headers = 'host:' + host + '\n'
signed_headers = 'host'
algorithm = 'AWS4-HMAC-SHA256'
credential_scope = datestamp + '/' + region + '/' + service + '/' + 'aws4_request'

canonical_querystring_part1 = 'Action=SendEmail' \
                              '&Destination.ToAddresses.member.1={}' \
                              '&Message.Body.Html.Charset=UTF-8' \
                              '&Message.Body.Html.Data={}' \
                              '&Message.Body.Text.Charset=UTF-8' \
                              '&Message.Body.Text.Data={}' \
                              '&Message.Subject.Charset=UTF-8' \
                              '&Message.Subject.Data={}' \
                              '&Source={}'.format(urllib.parse.quote(my_email, safe=''), 
                                                  urllib.parse.quote('<b>Html Hello.</b>', safe=''), 
                                                  urllib.parse.quote('Non Html hello.', safe=''),
                                                  urllib.parse.quote('Asyncio Subject line.', safe=''), 
                                                  urllib.parse.quote(my_email, safe=''))
canonical_querystring_part2 = '&X-Amz-Algorithm=AWS4-HMAC-SHA256'
canonical_querystring_part2 += '&X-Amz-Credential=' + urllib.parse.quote_plus(access_key + '/' + credential_scope)
canonical_querystring_part2 += '&X-Amz-Date=' + amz_date
canonical_querystring_part2 += '&X-Amz-Expires=30'
canonical_querystring_part2 += '&X-Amz-SignedHeaders=' + signed_headers
canonical_querystring = canonical_querystring_part1 + canonical_querystring_part2

payload_hash = hashlib.sha256(''.encode('utf-8')).hexdigest()
canonical_request = method + '\n' + canonical_uri + '\n' + canonical_querystring + '\n' + canonical_headers + '\n' + signed_headers + '\n' + payload_hash
string_to_sign = algorithm + '\n' + amz_date + '\n' + credential_scope + '\n' + hashlib.sha256(canonical_request.encode('utf-8')).hexdigest()

signing_key = getSignatureKey(secret_key, datestamp, region, service)
signature = hmac.new(signing_key, string_to_sign.encode('utf-8'), hashlib.sha256).hexdigest()

canonical_querystring += '&X-Amz-Signature=' + signature
request_url = endpoint + "?" + canonical_querystring


r = requests.get(request_url)

它有点长，但运行良好。这是我试图做同样的事情，但是有一个帖子请求：

import datetime
import hashlib
import hmac
import requests


def sign(key, msg):
    return hmac.new(key, msg.encode('utf-8'), hashlib.sha256).digest()


def getSignatureKey(key, dateStamp, regionName, serviceName):
    kDate = sign(('AWS4' + key).encode('utf-8'), dateStamp)
    kRegion = sign(kDate, regionName)
    kService = sign(kRegion, serviceName)
    kSigning = sign(kService, 'aws4_request')
    return kSigning


method = 'POST'
service = 'ses'
host = 'email.us-east-1.amazonaws.com'
region = 'us-east-1'
endpoint = 'https://email.us-east-1.amazonaws.com/'
access_key = 'my_access_key'
secret_key = 'my_secret_key'
my_email = 'my_email_address'


content_type = 'application/x-www-form-urlencoded; charset=utf-8'


# Request parameters for CreateTable--passed in a JSON block.
request_parameters = '{'
request_parameters += "'body': {'Action': 'SendEmail', 'Destination.ToAddresses.member.1': '%s', 'Message.Body.Html.Charset': 'UTF-8', " \
                      "'Message.Body.Html.Data': 'HTMLMESSAGE', 'Message.Body.Text.Charset': 'UTF-8', 'Message.Body.Text.Data': 'nonHTMLmessage', 'Message.Subject.Charset': 'UTF-8', " \
                      "'Message.Subject.Data': 'subject','Source': '%s'}, " % (my_email, my_email)
request_parameters += "'Content-Type': '%s', " % content_type
request_parameters += "'context': {'client_region': 'us-east-1'}"
request_parameters += '}'


t = datetime.datetime.utcnow()
amz_date = t.strftime('%Y%m%dT%H%M%SZ')
date_stamp = t.strftime('%Y%m%d')


canonical_uri = '/'
canonical_querystring = ''
canonical_headers = 'content-type:' + content_type + '\n' + 'host:' + host + '\n' + 'x-amz-date:' + amz_date + '\n'
signed_headers = 'content-type;host;x-amz-date'

payload_hash = hashlib.sha256(request_parameters.encode('utf-8')).hexdigest()

canonical_request = method + '\n' + canonical_uri + '\n' + canonical_querystring + '\n' + canonical_headers + '\n' + signed_headers + '\n' + payload_hash
algorithm = 'AWS4-HMAC-SHA256'
credential_scope = date_stamp + '/' + region + '/' + service + '/' + 'aws4_request'

string_to_sign = algorithm + '\n' + amz_date + '\n' + credential_scope + '\n' + hashlib.sha256(canonical_request.encode('utf-8')).hexdigest()
signing_key = getSignatureKey(secret_key, date_stamp, region, service)
signature = hmac.new(signing_key, string_to_sign.encode('utf-8'), hashlib.sha256).hexdigest()

authorization_header = algorithm + ' ' + 'Credential=' + access_key + '/' + credential_scope + ', ' + 'SignedHeaders=' + signed_headers + ', ' + 'Signature=' + signature
headers = {'Content-Type': content_type, 'X-Amz-Date': amz_date, 'Authorization': authorization_header}


r = requests.post(endpoint, params=request_parameters, headers=headers)

我将尽我所能遵循Amazon关于v4签名过程的文档：https://docs.aws.amazon.com/general/latest/gr/sigv4-signed-request-examples.html

我还使用完整的获取和发布请求的例子，他们有SES在这里找到：https://docs.aws.amazon.com/ses/latest/DeveloperGuide/query-interface-examples.html

由于某种原因，它不起作用。我尝试将post请求中的kwarg从params改为json再改为data。

r = requests.post(endpoint, params=request_parameters, headers=headers)
<IncompleteSignatureException>
  <Message>When Content-Type:application/x-www-form-urlencoded, URL cannot include query-string parameters (after '?'): '/?%7B'body':%20%7B'Action':%20'SendEmail',%20'Destination.ToAddresses.member.1':%20'[e-mail]',%20'Message.Body.Html.Charset':%20'UTF-8',%20'Message.Body.Html.Data':%20'HTMLMESSAGE',%20'Message.Body.Text.Charset':%20'UTF-8',%20'Message.Body.Text.Data':%20'nonHTMLmessage',%20'Message.Subject.Charset':%20'UTF-8',%20'Message.Subject.Data':%20'subject','Source':%20'[e-mail]'%7D,%20'Content-Type':%20'application/x-www-form-urlencoded;%20charset=utf-8',%20'context':%20%7B'client_region':%20'us-east-1'%7D%7D'</Message>
</IncompleteSignatureException>

r = requests.post(endpoint, data=request_parameters, headers=headers)
<AccessDeniedException/>


r = requests.post(endpoint, json=request_parameters, headers=headers)
<InvalidSignatureException>
  <Message>The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details.</Message>
</InvalidSignatureException>

每种形式的发布请求都会给出不同的错误。任何有组织发布请求（或对亚马逊应用编程接口的请求）经验的人都知道我做错了什么吗？

在任何人写“使用他们的Python SDK”之前我不能。他们的SDK是阻塞的，我必须异步地这样做。我计划从请求转移到aiohttp。我现在正试图在请求中得到这个，因为问这个问题更简单。

如果可以请帮忙，谢谢你的阅读。

Answer 1

等待nvm我得。要在请求中指定正文，请使用“数据”kwarg。

此外，我的变量request_参数的格式必须为param1=This

哇，真头疼。