以下代码有效。
该代码主要来源于
先前的文章如何使用PYTHON实现Amazon Kinesis PutMedia方法和
使用Python的Amazon Kinesis视频PutMedia。其中一些更改是通过监视kinesis视频流c-producer 2.0.2的工作方式来完成的。
同一对密钥被设置了两次:一次是为了boto,另一次是在代码开头的两个特殊环境变量中。
your_env_access_key_var = 'AWS_KVS_USER_ACCESS_KEY'
your_env_secret_key_var = 'AWS_KVS_USER_SECRET_KEY'
your_stream_name = 'my-video-stream-test'
def get_endpoint_boto():
import boto3
client = boto3.client('kinesisvideo')
response = client.get_data_endpoint(
StreamName=your_stream_name,
APIName='PUT_MEDIA'
)
pp.pprint(response)
endpoint = response.get('DataEndpoint', None)
print("endpoint %s" % endpoint)
if endpoint is None:
raise Exception("endpoint none")
return endpoint
def sign(key, msg):
return hmac.new(key, msg.encode("utf-8"), hashlib.sha256).digest()
def get_signature_key(key, date_stamp, regionName, serviceName):
kDate = sign(('AWS4' + key).encode('utf-8'), date_stamp)
kRegion = sign(kDate, regionName)
kService = sign(kRegion, serviceName)
kSigning = sign(kService, 'aws4_request')
return kSigning
def get_host_from_endpoint(endpoint):
if not endpoint.startswith('https://'):
return None
retv = endpoint[len('https://'):]
return str(retv)
def get_region_from_endpoint(endpoint):
if not endpoint.startswith('https://'):
return None
retv = endpoint[len('https://'):].split('.')[2]
return str(retv)
class gen_request_parameters:
def __init__(self):
self._data = ''
if True:
localfile = '6-step_example.webm.360p.webm'
with open(localfile, 'rb') as image:
request_parameters = image.read()
self._data = request_parameters
self._pointer = 0
self._size = len(self._data)
def __iter__(self):
return self
def next(self):
if self._pointer >= self._size:
raise StopIteration
left = self._size - self._pointer
chunksz = 16000
if left < 16000:
chunksz = left
pointer_start = self._pointer
self._pointer += chunksz
print("Data: chunk size %d" % chunksz)
return self._data[pointer_start:self._pointer]
endpoint = get_endpoint_boto()
method = 'POST'
service = 'kinesisvideo'
host = get_host_from_endpoint(endpoint)
region = get_region_from_endpoint(endpoint)
endpoint += '/putMedia'
content_type = 'application/json'
start_tmstp = repr(time.time())
access_key = None
secret_key = None
while True:
k = os.getenv(your_env_access_key_var)
if k is not None and type(k) is str and k.startswith('AKIA5'):
access_key = k
k = os.getenv(your_env_secret_key_var)
if k is not None and type(k) is str and len(k) > 4:
secret_key = k
break
if access_key is None or secret_key is None:
print('No access key is available.')
sys.exit()
t = datetime.datetime.utcnow()
amz_date = t.strftime('%Y%m%dT%H%M%SZ')
date_stamp = t.strftime('%Y%m%d')
canonical_uri = '/putMedia'
canonical_querystring = ''
canonical_headers = ''
canonical_headers += 'connection:keep-alive\n'
canonical_headers += 'content-type:application/json\n'
canonical_headers += 'host:' + host + '\n'
canonical_headers += 'transfer-encoding:chunked\n'
canonical_headers += 'user-agent:AWS-SDK-KVS/2.0.2 GCC/7.4.0 Linux/4.15.0-46-generic x86_64\n'
canonical_headers += 'x-amz-date:' + amz_date + '\n'
canonical_headers += 'x-amzn-fragment-acknowledgment-required:1\n'
canonical_headers += 'x-amzn-fragment-timecode-type:ABSOLUTE\n'
canonical_headers += 'x-amzn-producer-start-timestamp:' + start_tmstp + '\n'
canonical_headers += 'x-amzn-stream-name:' + your_stream_name + '\n'
signed_headers = 'connection;content-type;host;transfer-encoding;user-agent;'
signed_headers += 'x-amz-date;x-amzn-fragment-acknowledgment-required;'
signed_headers += 'x-amzn-fragment-timecode-type;x-amzn-producer-start-timestamp;x-amzn-stream-name'
canonical_request = method + '\n' + canonical_uri + '\n' + canonical_querystring + '\n' + canonical_headers + '\n' + signed_headers
canonical_request += '\n'
canonical_request += hashlib.sha256(''.encode('utf-8')).hexdigest()
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 = get_signature_key(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 + ', '
authorization_header += 'SignedHeaders=' + signed_headers + ', ' + 'Signature=' + signature
headers = {
'Accept': '*/*',
'Authorization': authorization_header,
'connection': 'keep-alive',
'content-type': content_type,
'transfer-encoding': 'chunked',
'user-agent': 'AWS-SDK-KVS/2.0.2 GCC/7.4.0 Linux/4.15.0-46-generic x86_64',
'x-amz-date': amz_date,
'x-amzn-fragment-acknowledgment-required': '1',
'x-amzn-fragment-timecode-type': 'ABSOLUTE',
'x-amzn-producer-start-timestamp': start_tmstp,
'x-amzn-stream-name': your_stream_name,
'Expect': '100-continue'
}
print('\nBEGIN REQUEST++++++++++++++++++++++++++++++++++++')
print('Request URL = ' + endpoint)
r = requests.post(endpoint, data=gen_request_parameters(), headers=headers)
print('\nRESPONSE++++++++++++++++++++++++++++++++++++')
print('Response code: %d\n' % r.status_code)
print(r.text)