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#datomic
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2021-06-12
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Drew Verlee23:06:32

I'm back to fiddlig with my datomic cloud solo instance, has anyone run into this cors issues on a solo toplogy? I cant think of a reasonable next step. https://forum.datomic.com/t/cors-issue/1870

Drew Verlee23:06:55

I believe i'm dealing with a lambda, so https://docs.aws.amazon.com/apigateway/latest/developerguide/how-to-cors.html "enabling cors support for lambda..." would be relevent. i created an option method, though i suppose i should test that theory.

jarrodctaylor23:06:14

I see in your forum post you have seen the tech note. Since you can successfully curl the end point. When you do that locally do you receive the expected headers?

Drew Verlee00:06:53

@U0508JRJC thanks a lot for the response. It looks like i do get the expected headers from curl:

< HTTP/2 200 
< date: Sun, 13 Jun 2021 00:39:24 GMT
< content-type: application/edn
< content-length: 847
< x-amzn-requestid: ef6a364c-55a7-430b-a2c0-8b2ede0e7bc5
< access-control-allow-origin: *
< access-control-allow-headers: Authorization, Content-Type
< x-amz-apigw-id: A1oFbEOxiYcFutA=
< access-control-allow-methods: GET, PUT, PATCH, POST, DELETE, OPTIONS
< x-amzn-trace-id: Root=1-60c553bc-5652c3b90fe79f8437318ff7;Sampled=0
<
full curl with -v (let me know if i need to pass more options)
➜  ion-starter git:(add-pomodoro-mode) curl -v  -d :hat 
*   Trying 3.23.22.174:443...
* TCP_NODELAY set
* Connected to  (3.23.22.174) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* successfully set certificate verify locations:
*   CAfile: /etc/ssl/certs/ca-certificates.crt
  CApath: /etc/ssl/certs
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
* TLSv1.3 (IN), TLS handshake, Server hello (2):
* TLSv1.2 (IN), TLS handshake, Certificate (11):
* TLSv1.2 (IN), TLS handshake, Server key exchange (12):
* TLSv1.2 (IN), TLS handshake, Server finished (14):
* TLSv1.2 (OUT), TLS handshake, Client key exchange (16):
* TLSv1.2 (OUT), TLS change cipher, Change cipher spec (1):
* TLSv1.2 (OUT), TLS handshake, Finished (20):
* TLSv1.2 (IN), TLS handshake, Finished (20):
* SSL connection using TLSv1.2 / ECDHE-RSA-AES128-GCM-SHA256
* ALPN, server accepted to use h2
* Server certificate:
*  subject: CN=*.
*  start date: Aug 29 00:00:00 2020 GMT
*  expire date: Sep 28 12:00:00 2021 GMT
*  subjectAltName: host "" matched cert's "*."
*  issuer: C=US; O=Amazon; OU=Server CA 1B; CN=Amazon
*  SSL certificate verify ok.
* Using HTTP2, server supports multi-use
* Connection state changed (HTTP/2 confirmed)
* Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0
* Using Stream ID: 1 (easy handle 0x55ebe17c7e10)
> POST /dev/datomic/ HTTP/2
> Host: 
> user-agent: curl/7.68.0
> accept: */*
> content-length: 4
> content-type: application/x-www-form-urlencoded
> 
* Connection state changed (MAX_CONCURRENT_STREAMS == 128)!
* We are completely uploaded and fine
< HTTP/2 200 
< date: Sun, 13 Jun 2021 00:39:24 GMT
< content-type: application/edn
< content-length: 847
< x-amzn-requestid: ef6a364c-55a7-430b-a2c0-8b2ede0e7bc5
< access-control-allow-origin: *
< access-control-allow-headers: Authorization, Content-Type
< x-amz-apigw-id: A1oFbEOxiYcFutA=
< access-control-allow-methods: GET, PUT, PATCH, POST, DELETE, OPTIONS
< x-amzn-trace-id: Root=1-60c553bc-5652c3b90fe79f8437318ff7;Sampled=0
< 
[[#:inv{:sku "SKU-51", :size :small, :color :yellow}]
 [#:inv{:sku "SKU-47", :size :xlarge, :color :blue}]
 [#:inv{:sku "SKU-39", :size :medium, :color :blue}]
 [#:inv{:sku "SKU-19", :size :small, :color :green}]
 [#:inv{:sku "SKU-55", :size :medium, :color :yellow}]
 [#:inv{:sku "SKU-15", :size :xlarge, :color :red}]
 [#:inv{:sku "SKU-35", :size :small, :color :blue}]
 [#:inv{:sku "SKU-27", :size :large, :color :green}]
 [#:inv{:sku "SKU-63", :size :xlarge, :color :yellow}]
 [#:inv{:sku "SKU-3", :size :small, :color :red}]
 [#:inv{:sku "SKU-43", :size :large, :color :blue}]
 [#:inv{:sku "SKU-59", :size :large, :color :yellow}]
 [#:inv{:sku "SKU-31", :size :xlarge, :color :green}]
 [#:inv{:sku "SKU-7", :size :medium, :color :red}]
 [#:inv{:sku "SKU-11", :size :large, :color :red}]
 [#:inv{:sku "SKU-23", :size :medium, :color :green}]]
* Connection #0 to host  left intact
Maybe my js/fetch call is off? the content-type? I don't see why that would be a cors issues.

jarrodctaylor01:06:23

I do believe your issue is with the fetch call. You want to provide js as the argument. Perhaps something like

(js/fetch ""
          (clj->js {:mode    "cors"
                    :method  "POST"
                    :headers {"Content-Type" "text/plain"}
                    :body    ":hat"}))

Drew Verlee01:06:13

Your clearly right that I would need to pass the map to clj to js. I was using lambs island fetch and I forgot to change the args when I switched to pure JS.

jarrodctaylor01:06:46

Happens to all of us 🙂