is there some reason for blocking this that im missing?
is there some reason for blocking this that im missing?
Cit's a super common restriction to prevent abuse
Cfor mail submission there are other ports which are usually used like 587
Ais smtp not email submission? now im confused
CThese days, port 25 is mainly used for SMTP Relaying – transmitting messages between different email servers. It’s not recommended to use for email submission unless you specifically manage your own mail server.https://mailtrap.io/blog/smtp-ports-25-465-587-used-for/
Aahhhh
Athat makes sense, sorry for my confusion. So my usecase would work?
Asending mail using a mail provider through smtp?
CAs long as you don't use that port. Typically mail wouldn't be send that way via Workers though, you'd use a REST/HTTP API. Otherwise for raw tcp, You'd have to find some library that works with Cloudflare's non-standard tcp socket api (or could be hacked into working)
Amy mail provider doesnt provide an http api unfortunately, that was one of the first thing i checked for. Are you aware of any smtp apis for workers?
Ai tried searching myself, but i could only find stuff talking about mailchannels
Cmailchannel's worker integration is dead and it was http/rest api anyway. I'm not aware of any smtp libraries that work with Workers no, I also haven't really gone out of my way to look. Not sure how complex SMTP is, espec with its weird tls stuff
Aoh wow its dead? makes sense, it didnt feel very permenant when it was announced 
thank you for your help
thank you for your help
Cyup: https://community.cloudflare.com/t/mailchannels-end-of-life-notice-migrate-now/658638
There is a few http/rest api options linked there as well like postmark/sendgrid/resend, if you're not stuck with your current
There is a few http/rest api options linked there as well like postmark/sendgrid/resend, if you're not stuck with your current
XEverybody just uses HTTP APIs, but I think in theory if you were really dedicated, and your provider supported a port besides 25, you could write your own SMTP client using Worker TCP https://blog.cloudflare.com/workers-tcp-socket-api-connect-databases/
The Cloudflare Blog
Today, we are excited to announce a new API in Cloudflare Workers for creating outbound TCP sockets, making it possible to connect directly to databases and any TCP-based service from Workers.
XPath of least resistance might be to adapt an existing SMTP library to the Worker's TCP API
Ayeah thats my current plan. Doing some more research to be sure theres not an already existing one for workers
XThat is, overall however, not the easiest solution. That is just switching to any other provider, most of whom have a REST API
XIf you're that set on using your specific SMTP-only provider, another option is hosting an SMTP proxy server on some $5 VPS and then calling that via HTTP from your worker
Athat also crossed my mine, but im not sure i want to maintain another microservice outside of cloudflare just for proxying stuff from cloudflare. Although I also probably dont want to maintain a smtp library. I'll look at how complicated smtp libraries are and go from there
XI'd agree with you there. I'm not sure if you have a specific reason for wanting to keep with your current providers, but the options are probably endless, 99% with HTTP APIs
HThanks @ajgeiss0702. Just to confirm, you implemented the cache API on the request being sent to KV, or were you referring to caching the external API request? Any chance you have a code sample that you can share?
AI am putting the token into the cache api, then checking that before checking for the token in KV
Agive me a minute to find that code
Aah unfortunately that specific implementation is not open sourced currently, but its basically this for checking using the cache api:
and for storing the response in the cache api:
theres some conversion stuff there because miniflare's response object doesnt match the web api, but you might not have to deal with that depending on what youre doing
and for storing the response in the cache api:
theres some conversion stuff there because miniflare's response object doesnt match the web api, but you might not have to deal with that depending on what youre doing
H@ajgeiss0702 Thank you so much. I'll try to follow this approach for my use-case. Really appreciate the help!
SRebuild feature is very helpfull
Phey! does anyone knows why when testing a service worker in localhost gives me this error:
but when deploying the exact same code to a worker and testing it, works fine? Iwrangler 3.4.0`
but when deploying the exact same code to a worker and testing it, works fine? Iwrangler 3.4.0`
SI don't want to have sensitive information (api key, etc.) in wrangler.toml, so I am running a shell in the build command that dynamically creates wrangler.toml from the build variables and runs wrangler deploy using that wrangler.toml.
How does everyone protect their sensitive information?
How does everyone protect their sensitive information?
HYou shouldn’t be putting sensitive info in your wrangler.toml. Secrets can be deployed separately
SThank you very much! Yes, I know. So I have created wrangler.toml.template and run the build command to generate the wrangler.toml file shell with the build variables.
You can also refer to the values registered in github actions secrets in the secrets property of github actions, but I think it will be difficult to manage if you register PRD_API_KEY, STG_API_KEY, etc. for each environment. So I have Cloudflare Workers (PRD, STG, E2E, Test, etc...) created for each environment. I register environment variables in the build variables of What do you think about this solution?
You can also refer to the values registered in github actions secrets in the secrets property of github actions, but I think it will be difficult to manage if you register PRD_API_KEY, STG_API_KEY, etc. for each environment. So I have Cloudflare Workers (PRD, STG, E2E, Test, etc...) created for each environment. I register environment variables in the build variables of What do you think about this solution?
HDid you do a for the deploy?
SOH, I didn't know there was such a practice! I will try it!
BHello everyone, how do you handle the long TCP SSL handshake when the worker is performing a fetch operation?
BIs there any way to reduce the handshake time? In the worker's fetch
B
BHi
Bwill i get charged if cloudflare workers free plans reached the limit (100000 requests/day) ?
BWe have an API which ingests images from the user and stores them in an R2 bucket. One part of that API which is hard to implement on the Workers platform is image transformation and validation. Use-cases such as
- transforming the image on ingest to compress and shrink to a certain max resolution
- validating image dimensions (must be 128x128px for example)
Does anyone have any experience or recommendations with these use-cases?
We used which cannot run on Workers. Perhaps could use but it's probably costly on CPU and Workers have limited memory. Cloudflare Images seems to be more about serving images with transformations, rather than transforming/validating on ingest via a worker (would prefer to store a single minified image in R2)?
0how do yall do logging?
0in cloudflare worker
DIf you didn't upgrade to a paid plan no, further requests will simply fail
MHi, the feature matrix for "workers vs. pages" says that middleware isn't supported and to use service bindings. But how does that help to secure a *.workers.dev Url? That's an url I don't control, but I still want basic auth for those...
WWe recommend disabling workers.dev or putting Access on it
MI'm trying to achieve that somehow but the options seem very limited because "Workers which have static assets cannot be routed on a URL which has a path component".. so essentially I would need an entire custom domain just to have my worker for assets available anywhere. Half the problem might be that Cloudflare Access is probably overkill even if I do get access for that on the company account
AYour Wrangler version is very out of date - I had a similar problem, I think even now local service bindings are experimental - but I’d try updating to the latest version of Wrangler as a first step
HUsing a Router?
HAny router
HAt least I know Hono and Itty could do that
AHey! 
I am looking to expose prometheus metrics out of my workers.
What could be the best way for this?
?
I am looking to expose prometheus metrics out of my workers.
What could be the best way for this?
- have DO that stores the metrics. And expose the metrics on another /metrics worker
- use analytics engine to store the metrics, and expose them on another /metrics worker
- build recorded queries on top of logs with something like Loki?
?ABasically I want to end up with otel metrics like: