AWS CLI Update_Stack can't pass parameter value containing a / - amazon-web-services

Question

I've been banging my head all morning on trying to create a powershell script that will ultimately update an AWS stack. Everything is great right up to the point where I have to pass parameters to the cloudformation template.
One of the parameter values (ParameterKey=ZipFilePath) contains a /. But the script fails complaining that it was expecting a = but found a /. I've tried escaping the slash but then the API complains that it found the backslash instead of an equals. Where am I going wrong?
... <snip creating a zip file> ...
$filename = ("TotalCommApi-" + $DateTime + ".zip")
aws s3 cp $filename ("s3://S3BucketName/TotalCommApi/" + $filename)
aws cloudformation update-stack --stack-name TotalCommApi-Dev --template-url https://s3-region.amazonaws.com/S3bucketName/TotalCommApi/TotalCommApiCFTemplate.json --parameters ParameterKey=S3BucketName,ParameterValue=S3BucketNameValue,UsePreviousValue=false ParameterKey=ZipFilePath,ParameterValue=("TotalCommApi/" + $filename) ,UsePreviousValue=false
cd C:\Projects\TotalCommApi\TotalComm_API
And here is the pertinent section from the CloudFormation Template:
"Description": "An AWS Serverless Application that uses the ASP.NET Core framework running in Amazon Lambda.",
"Parameters": {
"ZipFilePath": {
"Type": "String",
"Description": "Path to the zip file containing the Lambda Functions code to be published."
},
"S3BucketName": {
"Type": "String",
"Description": "Name of the S3 bucket where the ZipFile resides."
}
},
"AWSTemplateFormatVersion": "2010-09-09",
"Outputs": {},
"Conditions": {},
"Resources": {
"ProxyFunction": {
"Type": "AWS::Lambda::Function",
"Properties": {
"Code": {
"S3Bucket": {"Ref": "S3BucketName" },
"S3Key": { "Ref": "ZipFilePath" }
},
And this is the error message generated by PowerShell ISE
[image removed]
Update: I am using Windows 7 which comes with Powershell 2. I updgraded to Powershell 4. Then my script yielded this error:
On recommendation from a consulting firm, I uninstalled the CLI that I installed via msi, then I upgraded Python to 3.6.2 and then re-installed the CLI via pip. I still get the same error. I "echo"d the command to the screen and this is what I see:
upload: .\TotalCommApi-201806110722.zip to s3://S3bucketName/TotalCommApi/TotalCommApi-201806110722.zip
aws
cloudformation
update-stack
--stack-name
TotalCommApi-Dev
--template-url
https://s3-us-west-2.amazonaws.com/s3BucketName/TotalCommApi/TotalCommApiCFTemplate.json
--parameters
ParameterKey=S3BucketName
UsePreviousValue=true
ParameterKey=ZipFilePath
ParameterValue=TotalCommApi/TotalCommApi-201806110722.zip

Answer 1

Sorry for the delay getting back to you on this - the good news is that I might have a hint about what your issue is.
ParameterKey=ZipFilePath,ParameterValue=("TotalCommApi/" + $filename) ,UsePreviousValue=false
I was driving myself mad trying to reproduce this issue. Why? Because I assumed that the space after ("TotalCommApi/" + $filename) was an artifact from copying, not the actual value that you were using. When I added the space in:
aws cloudformation update-stack --stack-name test --template-url https://s3.amazonaws.com/test-bucket-06-09/test.template --parameters ParameterKey=S3BucketName,ParameterValue=$bucketname,UsePreviousValue=false ParameterKey=ZipFilePath,ParameterValue=testfolder/$filename ,UsePreviousValue=false
Error parsing parameter '--parameters': Expected: '=', received: ','
This isn't exactly your error message (, instead of /), but I think it's probably a similar issue in your case - check to make sure the values that are being used in your command don't have extra spaces somewhere.