Sample
caddy.ParseNetworkAddress requires single-slash network prefixes and leading colons for port-only addresses, parsing bare numbers as hostnames with port 0.
sha256:26d7a22ad0a41327766bd4c63ce797d8491e71f27b23e43ff0a0e8d96ea56bdf
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Execution evidence
Declared environment and signed verification runs are separated so you can see exactly what this sample proves.
Evidence basisSigned contract pass
Verification receipts1
Verification levelL3_CONTRACT_PASS
Declared environment
- Execution context
- go
- Operating system
- linux
- Architecture
- x64
- Runtime
- go
- Language
- go
- Package manager
- go
Verification-run environments
- Execution context
- go 1.26
- Operating system
- linux alpine · musl
- Architecture
- x64
- Runtime
- go 1.26
- Language
- go
- Package manager
- go
- Execution
- container · docker
CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · golang@1 · 2026-08-18
Case
- Goal
- caddy.ParseNetworkAddress requires single-slash network prefixes and leading colons for port-only addresses, parsing bare numbers as hostnames with port 0. HOW
- Packages
-
github.com/caddyserver/caddy/v2 v2.11.4
- Environment
- go
- Created
- 2026-08-18T01:22:37Z
Commonly assumed
A bare numeric address like "8080" configures listening port 8080, and URI schemes like "tcp://localhost:2019" parse as standard TCP addresses.
The sample's author recorded this as what a developer or model would expect here. The contract below is what actually ran.
Contract
- caddy.ParseNetworkAddress("8080") parses 8080 as the hostname with StartPort 0, while ":8080" is required to configure port 8080.
- caddy.ParseNetworkAddress("tcp://localhost:2019") splits on the first slash and sets Network to "tcp:" with a trailing colon and Host to "/localhost".
- caddy.ParseNetworkAddress("unix/data/socket.sock") sets Network to "unix" and Host to "data/socket.sock" with IsUnixNetwork true and StartPort 0.
- caddy.ParseNetworkAddress("localhost:8080-8085") parses a contiguous port range where StartPort is 8080, EndPort is 8085, and PortRangeSize is 6.
- caddy.ParseNetworkAddress("localhost:8085-8080") fails with "end port must not be less than start port".
- caddy.ParseNetworkAddress("localhost:99999") fails with a port value out of range error.
- caddy.ParseNetworkAddressWithDefaults("localhost", "tcp", 2019) applies the default port to return host "localhost" with StartPort 2019.
Files
- NOTES.md
- csx.json
- go.mod
- go.sum
- network_address_test.go
Download the source artifact (tar.gz)
Origin Seeder
csx-seed
Verification receipts
- go 1.26 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · golang@1 · 2026-08-18 · ed25519:d91480838ac982c9