feat: initial FRED API Proxy project
- Go web server using Gin framework - Proxy FRED economic data API - Support series, observations, search, releases endpoints
This commit is contained in:
34
config/config.go
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34
config/config.go
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@@ -0,0 +1,34 @@
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package config
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import (
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"os"
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)
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type Config struct {
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FREDAPIKey string
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ServerPort string
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FREDBaseURL string
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}
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func Load() *Config {
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apiKey := os.Getenv("FRED_API_KEY")
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if apiKey == "" {
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apiKey = "987b9c3428a3d0fe90179e3e6298d05e"
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}
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port := os.Getenv("SERVER_PORT")
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if port == "" {
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port = "8080"
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}
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baseURL := os.Getenv("FRED_BASE_URL")
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if baseURL == "" {
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baseURL = "https://api.stlouisfed.org/fred"
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}
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return &Config{
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FREDAPIKey: apiKey,
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ServerPort: port,
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FREDBaseURL: baseURL,
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}
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}
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35
go.mod
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35
go.mod
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@@ -0,0 +1,35 @@
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module fred-api
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go 1.21
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require (
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github.com/gin-gonic/gin v1.9.1
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github.com/joho/godotenv v1.5.1
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)
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require (
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github.com/bytedance/sonic v1.9.1 // indirect
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github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect
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github.com/gabriel-vasile/mimetype v1.4.2 // indirect
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github.com/gin-contrib/sse v0.1.0 // indirect
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github.com/go-playground/locales v0.14.1 // indirect
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|
github.com/go-playground/universal-translator v0.18.1 // indirect
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|
github.com/go-playground/validator/v10 v10.14.0 // indirect
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|
github.com/goccy/go-json v0.10.2 // indirect
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|
github.com/json-iterator/go v1.1.12 // indirect
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github.com/klauspost/cpuid/v2 v2.2.4 // indirect
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github.com/leodido/go-urn v1.2.4 // indirect
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github.com/mattn/go-isatty v0.0.19 // indirect
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github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
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github.com/modern-go/reflect2 v1.0.2 // indirect
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|
github.com/pelletier/go-toml/v2 v2.0.8 // indirect
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|
github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
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|
github.com/ugorji/go/codec v1.2.11 // indirect
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|
golang.org/x/arch v0.3.0 // indirect
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golang.org/x/crypto v0.9.0 // indirect
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golang.org/x/net v0.10.0 // indirect
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golang.org/x/sys v0.8.0 // indirect
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golang.org/x/text v0.9.0 // indirect
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google.golang.org/protobuf v1.30.0 // indirect
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gopkg.in/yaml.v3 v3.0.1 // indirect
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)
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88
go.sum
Normal file
88
go.sum
Normal file
@@ -0,0 +1,88 @@
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|
github.com/bytedance/sonic v1.5.0/go.mod h1:ED5hyg4y6t3/9Ku1R6dU/4KyJ48DZ4jPhfY1O2AihPM=
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|
github.com/bytedance/sonic v1.9.1 h1:6iJ6NqdoxCDr6mbY8h18oSO+cShGSMRGCEo7F2h0x8s=
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|
github.com/bytedance/sonic v1.9.1/go.mod h1:i736AoUSYt75HyZLoJW9ERYxcy6eaN6h4BZXU064P/U=
|
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|
github.com/chenzhuoyu/base64x v0.0.0-20211019084208-fb5309c8db06/go.mod h1:DH46F32mSOjUmXrMHnKwZdA8wcEefY7UVqBKYGjpdQY=
|
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|
github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 h1:qSGYFH7+jGhDF8vLC+iwCD4WpbV1EBDSzWkJODFLams=
|
||||||
|
github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311/go.mod h1:b583jCggY9gE99b6G5LEC39OIiVsWj+R97kbl5odCEk=
|
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|
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
|
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|
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
|
||||||
|
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
|
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|
github.com/gabriel-vasile/mimetype v1.4.2 h1:w5qFW6JKBz9Y393Y4q372O9A7cUSequkh1Q7OhCmWKU=
|
||||||
|
github.com/gabriel-vasile/mimetype v1.4.2/go.mod h1:zApsH/mKG4w07erKIaJPFiX0Tsq9BFQgN3qGY5GnNgA=
|
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|
github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=
|
||||||
|
github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
|
||||||
|
github.com/gin-gonic/gin v1.9.1 h1:4idEAncQnU5cB7BeOkPtxjfCSye0AAm1R0RVIqJ+Jmg=
|
||||||
|
github.com/gin-gonic/gin v1.9.1/go.mod h1:hPrL7YrpYKXt5YId3A/Tnip5kqbEAP+KLuI3SUcPTeU=
|
||||||
|
github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s=
|
||||||
|
github.com/go-playground/assert/v2 v2.2.0/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
|
||||||
|
github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/oXslEjJA=
|
||||||
|
github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY=
|
||||||
|
github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY=
|
||||||
|
github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
|
||||||
|
github.com/go-playground/validator/v10 v10.14.0 h1:vgvQWe3XCz3gIeFDm/HnTIbj6UGmg/+t63MyGU2n5js=
|
||||||
|
github.com/go-playground/validator/v10 v10.14.0/go.mod h1:9iXMNT7sEkjXb0I+enO7QXmzG6QCsPWY4zveKFVRSyU=
|
||||||
|
github.com/goccy/go-json v0.10.2 h1:CrxCmQqYDkv1z7lO7Wbh2HN93uovUHgrECaO5ZrCXAU=
|
||||||
|
github.com/goccy/go-json v0.10.2/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
|
||||||
|
github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
|
||||||
|
github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
|
||||||
|
github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
|
||||||
|
github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
|
||||||
|
github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
|
||||||
|
github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
|
||||||
|
github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
|
||||||
|
github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
|
||||||
|
github.com/klauspost/cpuid/v2 v2.0.9/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=
|
||||||
|
github.com/klauspost/cpuid/v2 v2.2.4 h1:acbojRNwl3o09bUq+yDCtZFc1aiwaAAxtcn8YkZXnvk=
|
||||||
|
github.com/klauspost/cpuid/v2 v2.2.4/go.mod h1:RVVoqg1df56z8g3pUjL/3lE5UfnlrJX8tyFgg4nqhuY=
|
||||||
|
github.com/leodido/go-urn v1.2.4 h1:XlAE/cm/ms7TE/VMVoduSpNBoyc2dOxHs5MZSwAN63Q=
|
||||||
|
github.com/leodido/go-urn v1.2.4/go.mod h1:7ZrI8mTSeBSHl/UaRyKQW1qZeMgak41ANeCNaVckg+4=
|
||||||
|
github.com/mattn/go-isatty v0.0.19 h1:JITubQf0MOLdlGRuRq+jtsDlekdYPia9ZFsB8h/APPA=
|
||||||
|
github.com/mattn/go-isatty v0.0.19/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
|
||||||
|
github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
|
||||||
|
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
|
||||||
|
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
|
||||||
|
github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9Gz0M=
|
||||||
|
github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
|
||||||
|
github.com/pelletier/go-toml/v2 v2.0.8 h1:0ctb6s9mE31h0/lhu+J6OPmVeDxJn+kYnJc2jZR9tGQ=
|
||||||
|
github.com/pelletier/go-toml/v2 v2.0.8/go.mod h1:vuYfssBdrU2XDZ9bYydBu6t+6a6PYNcZljzZR9VXg+4=
|
||||||
|
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
|
||||||
|
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
|
||||||
|
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
|
||||||
|
github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
|
||||||
|
github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
|
||||||
|
github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
|
||||||
|
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
|
||||||
|
github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
|
||||||
|
github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
|
||||||
|
github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
|
||||||
|
github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
|
||||||
|
github.com/stretchr/testify v1.8.3 h1:RP3t2pwF7cMEbC1dqtB6poj3niw/9gnV4Cjg5oW5gtY=
|
||||||
|
github.com/stretchr/testify v1.8.3/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
|
||||||
|
github.com/twitchyliquid64/golang-asm v0.15.1 h1:SU5vSMR7hnwNxj24w34ZyCi/FmDZTkS4MhqMhdFk5YI=
|
||||||
|
github.com/twitchyliquid64/golang-asm v0.15.1/go.mod h1:a1lVb/DtPvCB8fslRZhAngC2+aY1QWCk3Cedj/Gdt08=
|
||||||
|
github.com/ugorji/go/codec v1.2.11 h1:BMaWp1Bb6fHwEtbplGBGJ498wD+LKlNSl25MjdZY4dU=
|
||||||
|
github.com/ugorji/go/codec v1.2.11/go.mod h1:UNopzCgEMSXjBc6AOMqYvWC1ktqTAfzJZUZgYf6w6lg=
|
||||||
|
golang.org/x/arch v0.0.0-20210923205945-b76863e36670/go.mod h1:5om86z9Hs0C8fWVUuoMHwpExlXzs5Tkyp9hOrfG7pp8=
|
||||||
|
golang.org/x/arch v0.3.0 h1:02VY4/ZcO/gBOH6PUaoiptASxtXU10jazRCP865E97k=
|
||||||
|
golang.org/x/arch v0.3.0/go.mod h1:5om86z9Hs0C8fWVUuoMHwpExlXzs5Tkyp9hOrfG7pp8=
|
||||||
|
golang.org/x/crypto v0.9.0 h1:LF6fAI+IutBocDJ2OT0Q1g8plpYljMZ4+lty+dsqw3g=
|
||||||
|
golang.org/x/crypto v0.9.0/go.mod h1:yrmDGqONDYtNj3tH8X9dzUun2m2lzPa9ngI6/RUPGR0=
|
||||||
|
golang.org/x/net v0.10.0 h1:X2//UzNDwYmtCLn7To6G58Wr6f5ahEAQgKNzv9Y951M=
|
||||||
|
golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
|
||||||
|
golang.org/x/sys v0.0.0-20220704084225-05e143d24a9e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||||
|
golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||||
|
golang.org/x/sys v0.8.0 h1:EBmGv8NaZBZTWvrbjNoL6HVt+IVy3QDQpJs7VRIw3tU=
|
||||||
|
golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||||
|
golang.org/x/text v0.9.0 h1:2sjJmO8cDvYveuX97RDLsxlyUxLl+GHoLxBiRdHllBE=
|
||||||
|
golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
|
||||||
|
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
|
||||||
|
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
|
||||||
|
google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
|
||||||
|
google.golang.org/protobuf v1.30.0 h1:kPPoIgf3TsEvrm0PFe15JQ+570QVxYzEvvHqChK+cng=
|
||||||
|
google.golang.org/protobuf v1.30.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
|
||||||
|
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
|
||||||
|
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
|
||||||
|
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
|
||||||
|
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
|
||||||
|
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
|
||||||
|
rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=
|
||||||
291
handlers/fred.go
Normal file
291
handlers/fred.go
Normal file
@@ -0,0 +1,291 @@
|
|||||||
|
package handlers
|
||||||
|
|
||||||
|
import (
|
||||||
|
"encoding/json"
|
||||||
|
"fmt"
|
||||||
|
"io"
|
||||||
|
"net/http"
|
||||||
|
"net/url"
|
||||||
|
"strconv"
|
||||||
|
"strings"
|
||||||
|
|
||||||
|
"fred-api/config"
|
||||||
|
"fred-api/models"
|
||||||
|
|
||||||
|
"github.com/gin-gonic/gin"
|
||||||
|
)
|
||||||
|
|
||||||
|
type FREDHandler struct {
|
||||||
|
baseURL string
|
||||||
|
apiKey string
|
||||||
|
}
|
||||||
|
|
||||||
|
func NewFREDHandler(cfg *config.Config) *FREDHandler {
|
||||||
|
return &FREDHandler{
|
||||||
|
baseURL: cfg.FREDBaseURL,
|
||||||
|
apiKey: cfg.FREDAPIKey,
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func (h *FREDHandler) buildURL(endpoint string, params map[string]string) string {
|
||||||
|
u, _ := url.Parse(h.baseURL + endpoint)
|
||||||
|
query := u.Query()
|
||||||
|
query.Set("api_key", h.apiKey)
|
||||||
|
query.Set("file_type", "json")
|
||||||
|
|
||||||
|
for k, v := range params {
|
||||||
|
if v != "" {
|
||||||
|
query.Set(k, v)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
u.RawQuery = query.Encode()
|
||||||
|
return u.String()
|
||||||
|
}
|
||||||
|
|
||||||
|
func (h *FREDHandler) fetchData(url string, target interface{}) error {
|
||||||
|
resp, err := http.Get(url)
|
||||||
|
if err != nil {
|
||||||
|
return err
|
||||||
|
}
|
||||||
|
defer resp.Body.Close()
|
||||||
|
|
||||||
|
body, err := io.ReadAll(resp.Body)
|
||||||
|
if err != nil {
|
||||||
|
return err
|
||||||
|
}
|
||||||
|
|
||||||
|
if resp.StatusCode != http.StatusOK {
|
||||||
|
var errResp models.ErrorResponse
|
||||||
|
json.Unmarshal(body, &errResp)
|
||||||
|
return fmt.Errorf("API error: %s - %s", errResp.ErrorCode, errResp.ErrorMessage)
|
||||||
|
}
|
||||||
|
|
||||||
|
return json.Unmarshal(body, target)
|
||||||
|
}
|
||||||
|
|
||||||
|
func (h *FREDHandler) GetSeries(c *gin.Context) {
|
||||||
|
seriesID := c.Query("series_id")
|
||||||
|
if seriesID == "" {
|
||||||
|
c.JSON(http.StatusBadRequest, models.ErrorResponse{
|
||||||
|
ErrorCode: "BadRequest",
|
||||||
|
ErrorMessage: "series_id is required",
|
||||||
|
})
|
||||||
|
return
|
||||||
|
}
|
||||||
|
|
||||||
|
params := map[string]string{
|
||||||
|
"series_id": seriesID,
|
||||||
|
}
|
||||||
|
|
||||||
|
if realtimeStart := c.Query("realtime_start"); realtimeStart != "" {
|
||||||
|
params["realtime_start"] = realtimeStart
|
||||||
|
}
|
||||||
|
if realtimeEnd := c.Query("realtime_end"); realtimeEnd != "" {
|
||||||
|
params["realtime_end"] = realtimeEnd
|
||||||
|
}
|
||||||
|
|
||||||
|
url := h.buildURL("/series", params)
|
||||||
|
|
||||||
|
var response models.SeriesListResponse
|
||||||
|
if err := h.fetchData(url, &response); err != nil {
|
||||||
|
c.JSON(http.StatusInternalServerError, models.ErrorResponse{
|
||||||
|
ErrorCode: "InternalError",
|
||||||
|
ErrorMessage: err.Error(),
|
||||||
|
})
|
||||||
|
return
|
||||||
|
}
|
||||||
|
|
||||||
|
c.JSON(http.StatusOK, response)
|
||||||
|
}
|
||||||
|
|
||||||
|
func (h *FREDHandler) GetObservations(c *gin.Context) {
|
||||||
|
seriesID := c.Query("series_id")
|
||||||
|
if seriesID == "" {
|
||||||
|
c.JSON(http.StatusBadRequest, models.ErrorResponse{
|
||||||
|
ErrorCode: "BadRequest",
|
||||||
|
ErrorMessage: "series_id is required",
|
||||||
|
})
|
||||||
|
return
|
||||||
|
}
|
||||||
|
|
||||||
|
params := map[string]string{
|
||||||
|
"series_id": seriesID,
|
||||||
|
}
|
||||||
|
|
||||||
|
optionalParams := []string{
|
||||||
|
"realtime_start", "realtime_end", "limit", "offset", "sort_order",
|
||||||
|
"observation_start", "observation_end", "units", "frequency",
|
||||||
|
"aggregation_method", "output_type", "vintage_dates",
|
||||||
|
}
|
||||||
|
|
||||||
|
for _, param := range optionalParams {
|
||||||
|
if v := c.Query(param); v != "" {
|
||||||
|
params[param] = v
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
url := h.buildURL("/series/observations", params)
|
||||||
|
|
||||||
|
var response models.ObservationsResponse
|
||||||
|
if err := h.fetchData(url, &response); err != nil {
|
||||||
|
c.JSON(http.StatusInternalServerError, models.ErrorResponse{
|
||||||
|
ErrorCode: "InternalError",
|
||||||
|
ErrorMessage: err.Error(),
|
||||||
|
})
|
||||||
|
return
|
||||||
|
}
|
||||||
|
|
||||||
|
c.JSON(http.StatusOK, response)
|
||||||
|
}
|
||||||
|
|
||||||
|
func (h *FREDHandler) SearchSeries(c *gin.Context) {
|
||||||
|
searchText := c.Query("search_text")
|
||||||
|
if searchText == "" {
|
||||||
|
c.JSON(http.StatusBadRequest, models.ErrorResponse{
|
||||||
|
ErrorCode: "BadRequest",
|
||||||
|
ErrorMessage: "search_text is required",
|
||||||
|
})
|
||||||
|
return
|
||||||
|
}
|
||||||
|
|
||||||
|
params := map[string]string{
|
||||||
|
"search_text": searchText,
|
||||||
|
}
|
||||||
|
|
||||||
|
optionalParams := []string{
|
||||||
|
"realtime_start", "realtime_end", "limit", "offset", "sort_order",
|
||||||
|
"observation_start", "observation_end", "units", "frequency",
|
||||||
|
"aggregation_method", "output_type",
|
||||||
|
}
|
||||||
|
|
||||||
|
for _, param := range optionalParams {
|
||||||
|
if v := c.Query(param); v != "" {
|
||||||
|
params[param] = v
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
url := h.buildURL("/series/search", params)
|
||||||
|
|
||||||
|
var response models.SearchResponse
|
||||||
|
if err := h.fetchData(url, &response); err != nil {
|
||||||
|
c.JSON(http.StatusInternalServerError, models.ErrorResponse{
|
||||||
|
ErrorCode: "InternalServerError",
|
||||||
|
ErrorMessage: err.Error(),
|
||||||
|
})
|
||||||
|
return
|
||||||
|
}
|
||||||
|
|
||||||
|
c.JSON(http.StatusOK, response)
|
||||||
|
}
|
||||||
|
|
||||||
|
func (h *FREDHandler) GetReleases(c *gin.Context) {
|
||||||
|
params := map[string]string{}
|
||||||
|
|
||||||
|
optionalParams := []string{
|
||||||
|
"realtime_start", "realtime_end", "limit", "offset", "sort_order",
|
||||||
|
}
|
||||||
|
|
||||||
|
for _, param := range optionalParams {
|
||||||
|
if v := c.Query(param); v != "" {
|
||||||
|
params[param] = v
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
url := h.buildURL("/releases", params)
|
||||||
|
|
||||||
|
var response models.ReleasesResponse
|
||||||
|
if err := h.fetchData(url, &response); err != nil {
|
||||||
|
c.JSON(http.StatusInternalServerError, models.ErrorResponse{
|
||||||
|
ErrorCode: "InternalServerError",
|
||||||
|
ErrorMessage: err.Error(),
|
||||||
|
})
|
||||||
|
return
|
||||||
|
}
|
||||||
|
|
||||||
|
c.JSON(http.StatusOK, response)
|
||||||
|
}
|
||||||
|
|
||||||
|
func (h *FREDHandler) GetReleaseDates(c *gin.Context) {
|
||||||
|
params := map[string]string{}
|
||||||
|
|
||||||
|
optionalParams := []string{
|
||||||
|
"realtime_start", "realtime_end", "limit", "offset", "sort_order",
|
||||||
|
"release_id", "date", "start_date", "end_date",
|
||||||
|
}
|
||||||
|
|
||||||
|
for _, param := range optionalParams {
|
||||||
|
if v := c.Query(param); v != "" {
|
||||||
|
params[param] = v
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
url := h.buildURL("/releases/dates", params)
|
||||||
|
|
||||||
|
var response models.ReleaseDatesResponse
|
||||||
|
if err := h.fetchData(url, &response); err != nil {
|
||||||
|
c.JSON(http.StatusInternalServerError, models.ErrorResponse{
|
||||||
|
ErrorCode: "InternalServerError",
|
||||||
|
ErrorMessage: err.Error(),
|
||||||
|
})
|
||||||
|
return
|
||||||
|
}
|
||||||
|
|
||||||
|
c.JSON(http.StatusOK, response)
|
||||||
|
}
|
||||||
|
|
||||||
|
func (h *FREDHandler) GetReleaseSeries(c *gin.Context) {
|
||||||
|
releaseIDStr := c.Query("release_id")
|
||||||
|
if releaseIDStr == "" {
|
||||||
|
c.JSON(http.StatusBadRequest, models.ErrorResponse{
|
||||||
|
ErrorCode: "BadRequest",
|
||||||
|
ErrorMessage: "release_id is required",
|
||||||
|
})
|
||||||
|
return
|
||||||
|
}
|
||||||
|
|
||||||
|
releaseID, err := strconv.Atoi(releaseIDStr)
|
||||||
|
if err != nil {
|
||||||
|
c.JSON(http.StatusBadRequest, models.ErrorResponse{
|
||||||
|
ErrorCode: "BadRequest",
|
||||||
|
ErrorMessage: "release_id must be a number",
|
||||||
|
})
|
||||||
|
return
|
||||||
|
}
|
||||||
|
|
||||||
|
params := map[string]string{
|
||||||
|
"release_id": strings.TrimSpace(strings.Replace(strconv.Itoa(releaseID), " ", "", -1)),
|
||||||
|
}
|
||||||
|
|
||||||
|
optionalParams := []string{
|
||||||
|
"realtime_start", "realtime_end", "limit", "offset", "sort_order",
|
||||||
|
"observation_start", "observation_end", "units", "frequency",
|
||||||
|
"aggregation_method", "output_type",
|
||||||
|
}
|
||||||
|
|
||||||
|
for _, param := range optionalParams {
|
||||||
|
if v := c.Query(param); v != "" {
|
||||||
|
params[param] = v
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
url := h.buildURL("/release/series", params)
|
||||||
|
|
||||||
|
var response models.SearchResponse
|
||||||
|
if err := h.fetchData(url, &response); err != nil {
|
||||||
|
c.JSON(http.StatusInternalServerError, models.ErrorResponse{
|
||||||
|
ErrorCode: "InternalServerError",
|
||||||
|
ErrorMessage: err.Error(),
|
||||||
|
})
|
||||||
|
return
|
||||||
|
}
|
||||||
|
|
||||||
|
c.JSON(http.StatusOK, response)
|
||||||
|
}
|
||||||
|
|
||||||
|
func (h *FREDHandler) HealthCheck(c *gin.Context) {
|
||||||
|
c.JSON(http.StatusOK, gin.H{
|
||||||
|
"status": "healthy",
|
||||||
|
"service": "FRED API Proxy",
|
||||||
|
})
|
||||||
|
}
|
||||||
80
main.go
Normal file
80
main.go
Normal file
@@ -0,0 +1,80 @@
|
|||||||
|
package main
|
||||||
|
|
||||||
|
import (
|
||||||
|
"fmt"
|
||||||
|
"log"
|
||||||
|
"os"
|
||||||
|
"os/signal"
|
||||||
|
"syscall"
|
||||||
|
|
||||||
|
"fred-api/config"
|
||||||
|
"fred-api/handlers"
|
||||||
|
|
||||||
|
"github.com/gin-gonic/gin"
|
||||||
|
"github.com/joho/godotenv"
|
||||||
|
)
|
||||||
|
|
||||||
|
func main() {
|
||||||
|
if err := godotenv.Load(); err != nil {
|
||||||
|
log.Println("No .env file found, using default config")
|
||||||
|
}
|
||||||
|
|
||||||
|
cfg := config.Load()
|
||||||
|
|
||||||
|
fredHandler := handlers.NewFREDHandler(cfg)
|
||||||
|
|
||||||
|
gin.SetMode(gin.ReleaseMode)
|
||||||
|
router := gin.Default()
|
||||||
|
|
||||||
|
router.Use(func(c *gin.Context) {
|
||||||
|
c.Header("Access-Control-Allow-Origin", "*")
|
||||||
|
c.Header("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
|
||||||
|
c.Header("Access-Control-Allow-Headers", "Content-Type, Authorization")
|
||||||
|
if c.Request.Method == "OPTIONS" {
|
||||||
|
c.AbortWithStatus(204)
|
||||||
|
return
|
||||||
|
}
|
||||||
|
c.Next()
|
||||||
|
})
|
||||||
|
|
||||||
|
router.GET("/health", fredHandler.HealthCheck)
|
||||||
|
|
||||||
|
api := router.Group("/api/v1")
|
||||||
|
{
|
||||||
|
api.GET("/series", fredHandler.GetSeries)
|
||||||
|
api.GET("/series/observations", fredHandler.GetObservations)
|
||||||
|
api.GET("/series/search", fredHandler.SearchSeries)
|
||||||
|
api.GET("/releases", fredHandler.GetReleases)
|
||||||
|
api.GET("/releases/dates", fredHandler.GetReleaseDates)
|
||||||
|
api.GET("/release/series", fredHandler.GetReleaseSeries)
|
||||||
|
}
|
||||||
|
|
||||||
|
go func() {
|
||||||
|
fmt.Printf("FRED API Server starting on :%s\n", cfg.ServerPort)
|
||||||
|
fmt.Printf("FRED API Base URL: %s\n", cfg.FREDBaseURL)
|
||||||
|
fmt.Println("\nAvailable endpoints:")
|
||||||
|
fmt.Println(" GET /health - Health check")
|
||||||
|
fmt.Println(" GET /api/v1/series - Get series info")
|
||||||
|
fmt.Println(" GET /api/v1/series/observations - Get observations")
|
||||||
|
fmt.Println(" GET /api/v1/series/search - Search series")
|
||||||
|
fmt.Println(" GET /api/v1/releases - Get all releases")
|
||||||
|
fmt.Println(" GET /api/v1/releases/dates - Get release dates")
|
||||||
|
fmt.Println(" GET /api/v1/release/series - Get series in release")
|
||||||
|
fmt.Println("")
|
||||||
|
fmt.Println("Examples:")
|
||||||
|
fmt.Println(" curl 'http://localhost:" + cfg.ServerPort + "/api/v1/series?series_id=GNPCA'")
|
||||||
|
fmt.Println(" curl 'http://localhost:" + cfg.ServerPort + "/api/v1/series/observations?series_id=GNPCA&limit=10'")
|
||||||
|
fmt.Println(" curl 'http://localhost:" + cfg.ServerPort + "/api/v1/series/search?search_text=GDP'")
|
||||||
|
fmt.Println("")
|
||||||
|
|
||||||
|
if err := router.Run(":" + cfg.ServerPort); err != nil {
|
||||||
|
log.Fatalf("Failed to start server: %v", err)
|
||||||
|
}
|
||||||
|
}()
|
||||||
|
|
||||||
|
quit := make(chan os.Signal, 1)
|
||||||
|
signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
|
||||||
|
<-quit
|
||||||
|
|
||||||
|
fmt.Println("\nShutting down server...")
|
||||||
|
}
|
||||||
105
models/models.go
Normal file
105
models/models.go
Normal file
@@ -0,0 +1,105 @@
|
|||||||
|
package models
|
||||||
|
|
||||||
|
type Series struct {
|
||||||
|
ID string `json:"id"`
|
||||||
|
RealtimeStart string `json:"realtime_start"`
|
||||||
|
RealtimeEnd string `json:"realtime_end"`
|
||||||
|
Title string `json:"title"`
|
||||||
|
ObservationStart string `json:"observation_start"`
|
||||||
|
ObservationEnd string `json:"observation_end"`
|
||||||
|
Frequency string `json:"frequency"`
|
||||||
|
FrequencyShort string `json:"frequency_short"`
|
||||||
|
Units string `json:"units"`
|
||||||
|
UnitsShort string `json:"units_short"`
|
||||||
|
SeasonalAdjustment string `json:"seasonal_adjustment"`
|
||||||
|
SeasonalAdjustmentShort string `json:"seasonal_adjustment_short"`
|
||||||
|
LastUpdated string `json:"last_updated"`
|
||||||
|
Popularity int `json:"popularity"`
|
||||||
|
Notes string `json:"notes,omitempty"`
|
||||||
|
}
|
||||||
|
|
||||||
|
type SeriesListResponse struct {
|
||||||
|
RealtimeStart string `json:"realtime_start"`
|
||||||
|
RealtimeEnd string `json:"realtime_end"`
|
||||||
|
Seriess []Series `json:"seriess"`
|
||||||
|
}
|
||||||
|
|
||||||
|
type Observation struct {
|
||||||
|
RealtimeStart string `json:"realtime_start"`
|
||||||
|
RealtimeEnd string `json:"realtime_end"`
|
||||||
|
Date string `json:"date"`
|
||||||
|
Value string `json:"value"`
|
||||||
|
}
|
||||||
|
|
||||||
|
type ObservationsResponse struct {
|
||||||
|
RealtimeStart string `json:"realtime_start"`
|
||||||
|
RealtimeEnd string `json:"realtime_end"`
|
||||||
|
ObservationStart string `json:"observation_start"`
|
||||||
|
ObservationEnd string `json:"observation_end"`
|
||||||
|
Units string `json:"units"`
|
||||||
|
OutputType int `json:"output_type"`
|
||||||
|
FileType string `json:"file_type"`
|
||||||
|
OrderBy string `json:"order_by"`
|
||||||
|
SortOrder string `json:"sort_order"`
|
||||||
|
Count int `json:"count"`
|
||||||
|
Offset int `json:"offset"`
|
||||||
|
Limit int `json:"limit"`
|
||||||
|
Observations []Observation `json:"observations"`
|
||||||
|
}
|
||||||
|
|
||||||
|
type SearchResult struct {
|
||||||
|
ID string `json:"id"`
|
||||||
|
RealtimeStart string `json:"realtime_start"`
|
||||||
|
RealtimeEnd string `json:"realtime_end"`
|
||||||
|
Title string `json:"title"`
|
||||||
|
Frequency string `json:"frequency"`
|
||||||
|
Units string `json:"units"`
|
||||||
|
}
|
||||||
|
|
||||||
|
type SearchResponse struct {
|
||||||
|
RealtimeStart string `json:"realtime_start"`
|
||||||
|
RealtimeEnd string `json:"realtime_end"`
|
||||||
|
Count int `json:"count"`
|
||||||
|
Offset int `json:"offset"`
|
||||||
|
Limit int `json:"limit"`
|
||||||
|
OrderBy string `json:"order_by"`
|
||||||
|
SortOrder string `json:"sort_order"`
|
||||||
|
Results []SearchResult `json:"seriess"`
|
||||||
|
}
|
||||||
|
|
||||||
|
type Release struct {
|
||||||
|
ID int `json:"id"`
|
||||||
|
RealtimeStart string `json:"realtime_start"`
|
||||||
|
RealtimeEnd string `json:"realtime_end"`
|
||||||
|
Link string `json:"link"`
|
||||||
|
Name string `json:"name"`
|
||||||
|
PressRelease bool `json:"press_release"`
|
||||||
|
Notes string `json:"notes,omitempty"`
|
||||||
|
}
|
||||||
|
|
||||||
|
type ReleasesResponse struct {
|
||||||
|
RealtimeStart string `json:"realtime_start"`
|
||||||
|
RealtimeEnd string `json:"realtime_end"`
|
||||||
|
Count int `json:"count"`
|
||||||
|
Offset int `json:"offset"`
|
||||||
|
Limit int `json:"limit"`
|
||||||
|
Releases []Release `json:"releases"`
|
||||||
|
}
|
||||||
|
|
||||||
|
type ReleaseDatesResponse struct {
|
||||||
|
RealtimeStart string `json:"realtime_start"`
|
||||||
|
RealtimeEnd string `json:"realtime_end"`
|
||||||
|
Count int `json:"count"`
|
||||||
|
Offset int `json:"offset"`
|
||||||
|
Limit int `json:"limit"`
|
||||||
|
ReleaseDates []struct {
|
||||||
|
ReleaseID int `json:"release_id"`
|
||||||
|
Date string `json:"date"`
|
||||||
|
ReleaseName string `json:"release_name"`
|
||||||
|
} `json:"release_dates"`
|
||||||
|
}
|
||||||
|
|
||||||
|
type ErrorResponse struct {
|
||||||
|
ErrorCode string `json:"error_code"`
|
||||||
|
ErrorMessage string `json:"error_message"`
|
||||||
|
}
|
||||||
31
server.log
Normal file
31
server.log
Normal file
@@ -0,0 +1,31 @@
|
|||||||
|
2026/03/31 13:04:35 No .env file found, using default config
|
||||||
|
FRED API Server starting on :8080
|
||||||
|
FRED API Base URL: https://api.stlouisfed.org/fred
|
||||||
|
|
||||||
|
Available endpoints:
|
||||||
|
GET /health - Health check
|
||||||
|
GET /api/v1/series - Get series info
|
||||||
|
GET /api/v1/series/observations - Get observations
|
||||||
|
GET /api/v1/series/search - Search series
|
||||||
|
GET /api/v1/releases - Get all releases
|
||||||
|
GET /api/v1/releases/dates - Get release dates
|
||||||
|
GET /api/v1/release/series - Get series in release
|
||||||
|
|
||||||
|
Examples:
|
||||||
|
curl 'http://localhost:8080/api/v1/series?series_id=GNPCA'
|
||||||
|
curl 'http://localhost:8080/api/v1/series/observations?series_id=GNPCA&limit=10'
|
||||||
|
curl 'http://localhost:8080/api/v1/series/search?search_text=GDP'
|
||||||
|
|
||||||
|
[GIN] 2026/03/31 - 13:04:37 | 200 | 65.258µs | ::1 | GET "/health"
|
||||||
|
[GIN] 2026/03/31 - 13:26:20 | 200 | 54.616µs | ::1 | GET "/health"
|
||||||
|
[GIN] 2026/03/31 - 13:26:24 | 200 | 50.001µs | ::1 | GET "/health"
|
||||||
|
[GIN] 2026/03/31 - 13:26:26 | 200 | 357.800542ms | ::1 | GET "/api/v1/series?series_id=GNPCA"
|
||||||
|
[GIN] 2026/03/31 - 13:26:26 | 200 | 294.788721ms | ::1 | GET "/api/v1/series/observations?series_id=GNPCA&limit=5&sort_order=desc"
|
||||||
|
[GIN] 2026/03/31 - 13:26:29 | 200 | 2.612991796s | ::1 | GET "/api/v1/series/search?search_text=unemployment&limit=3"
|
||||||
|
[GIN] 2026/03/31 - 13:26:33 | 200 | 52.442µs | ::1 | GET "/health"
|
||||||
|
[GIN] 2026/03/31 - 13:26:34 | 200 | 326.98803ms | ::1 | GET "/api/v1/series?series_id=GNPCA"
|
||||||
|
[GIN] 2026/03/31 - 13:26:35 | 200 | 288.81544ms | ::1 | GET "/api/v1/series/observations?series_id=GNPCA&limit=5&sort_order=desc"
|
||||||
|
[GIN] 2026/03/31 - 13:26:41 | 500 | 1.001380921s | ::1 | GET "/api/v1/releases?limit=3"
|
||||||
|
[GIN] 2026/03/31 - 13:26:42 | 200 | 3.419214632s | ::1 | GET "/api/v1/series/search?search_text=unemployment%20rate&limit=3"
|
||||||
|
|
||||||
|
Shutting down server...
|
||||||
3
tests/go.mod
Normal file
3
tests/go.mod
Normal file
@@ -0,0 +1,3 @@
|
|||||||
|
module fred-api-test
|
||||||
|
|
||||||
|
go 1.21
|
||||||
88
tests/test_fred_api.go
Normal file
88
tests/test_fred_api.go
Normal file
@@ -0,0 +1,88 @@
|
|||||||
|
package main
|
||||||
|
|
||||||
|
import (
|
||||||
|
"encoding/json"
|
||||||
|
"fmt"
|
||||||
|
"io"
|
||||||
|
"net/http"
|
||||||
|
"net/url"
|
||||||
|
)
|
||||||
|
|
||||||
|
const (
|
||||||
|
APIKey = "987b9c3428a3d0fe90179e3e6298d05e"
|
||||||
|
BaseURL = "https://api.stlouisfed.org/fred"
|
||||||
|
)
|
||||||
|
|
||||||
|
func buildURL(endpoint string, params map[string]string) string {
|
||||||
|
u, _ := url.Parse(BaseURL + endpoint)
|
||||||
|
query := u.Query()
|
||||||
|
query.Set("api_key", APIKey)
|
||||||
|
query.Set("file_type", "json")
|
||||||
|
for k, v := range params {
|
||||||
|
if v != "" {
|
||||||
|
query.Set(k, v)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
u.RawQuery = query.Encode()
|
||||||
|
return u.String()
|
||||||
|
}
|
||||||
|
|
||||||
|
func fetchAndPrint(endpoint string, params map[string]string) {
|
||||||
|
url := buildURL(endpoint, params)
|
||||||
|
fmt.Printf("\n=== Testing %s ===\n", endpoint)
|
||||||
|
fmt.Printf("URL: %s\n\n", url)
|
||||||
|
|
||||||
|
resp, err := http.Get(url)
|
||||||
|
if err != nil {
|
||||||
|
fmt.Printf("Error: %v\n", err)
|
||||||
|
return
|
||||||
|
}
|
||||||
|
defer resp.Body.Close()
|
||||||
|
|
||||||
|
body, err := io.ReadAll(resp.Body)
|
||||||
|
if err != nil {
|
||||||
|
fmt.Printf("Error reading body: %v\n", err)
|
||||||
|
return
|
||||||
|
}
|
||||||
|
|
||||||
|
var prettyJSON map[string]interface{}
|
||||||
|
if err := json.Unmarshal(body, &prettyJSON); err == nil {
|
||||||
|
output, _ := json.MarshalIndent(prettyJSON, "", " ")
|
||||||
|
fmt.Printf("Response:\n%s\n", output)
|
||||||
|
} else {
|
||||||
|
fmt.Printf("Response:\n%s\n", string(body))
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func main() {
|
||||||
|
fmt.Println("========================================")
|
||||||
|
fmt.Println(" FRED API 测试脚本")
|
||||||
|
fmt.Println("========================================")
|
||||||
|
|
||||||
|
fetchAndPrint("/series", map[string]string{"series_id": "GNPCA"})
|
||||||
|
|
||||||
|
fetchAndPrint("/series/observations", map[string]string{
|
||||||
|
"series_id": "GNPCA",
|
||||||
|
"limit": "5",
|
||||||
|
"observation_end": "2000-01-01",
|
||||||
|
})
|
||||||
|
|
||||||
|
fetchAndPrint("/series/search", map[string]string{
|
||||||
|
"search_text": "GDP",
|
||||||
|
"limit": "3",
|
||||||
|
})
|
||||||
|
|
||||||
|
fetchAndPrint("/releases", map[string]string{
|
||||||
|
"limit": "3",
|
||||||
|
})
|
||||||
|
|
||||||
|
fetchAndPrint("/releases/dates", map[string]string{
|
||||||
|
"limit": "3",
|
||||||
|
"start_date": "2026-03-01",
|
||||||
|
"end_date": "2026-03-31",
|
||||||
|
})
|
||||||
|
|
||||||
|
fmt.Println("\n========================================")
|
||||||
|
fmt.Println(" 测试完成!")
|
||||||
|
fmt.Println("========================================")
|
||||||
|
}
|
||||||
Reference in New Issue
Block a user