forked from ebhomengo/niki
312 lines
8.8 KiB
Go
312 lines
8.8 KiB
Go
package echoSwagger
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import (
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"html/template"
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"net/http"
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"path/filepath"
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"regexp"
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"github.com/ghodss/yaml"
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"github.com/labstack/echo/v4"
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swaggerFiles "github.com/swaggo/files/v2"
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"github.com/swaggo/swag"
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)
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// Config stores echoSwagger configuration variables.
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type Config struct {
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// The url pointing to API definition (normally swagger.json or swagger.yaml). Default is `mockedSwag.json`.
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URLs []string
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DocExpansion string
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DomID string
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InstanceName string
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DeepLinking bool
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PersistAuthorization bool
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SyntaxHighlight bool
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// The information for OAuth2 integration, if any.
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OAuth *OAuthConfig
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}
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// OAuthConfig stores configuration for Swagger UI OAuth2 integration. See
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// https://swagger.io/docs/open-source-tools/swagger-ui/usage/oauth2/ for further details.
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type OAuthConfig struct {
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// The ID of the client sent to the OAuth2 IAM provider.
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ClientId string
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// The OAuth2 realm that the client should operate in. If not applicable, use empty string.
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Realm string
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// The name to display for the application in the authentication popup.
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AppName string
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}
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// URL presents the url pointing to API definition (normally swagger.json or swagger.yaml).
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func URL(url string) func(*Config) {
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return func(c *Config) {
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c.URLs = append(c.URLs, url)
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}
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}
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// DeepLinking true, false.
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func DeepLinking(deepLinking bool) func(*Config) {
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return func(c *Config) {
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c.DeepLinking = deepLinking
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}
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}
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// SyntaxHighlight true, false.
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func SyntaxHighlight(syntaxHighlight bool) func(*Config) {
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return func(c *Config) {
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c.SyntaxHighlight = syntaxHighlight
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}
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}
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// DocExpansion list, full, none.
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func DocExpansion(docExpansion string) func(*Config) {
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return func(c *Config) {
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c.DocExpansion = docExpansion
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}
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}
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// DomID #swagger-ui.
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func DomID(domID string) func(*Config) {
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return func(c *Config) {
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c.DomID = domID
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}
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}
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// InstanceName specified swag instance name.
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func InstanceName(instanceName string) func(*Config) {
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return func(c *Config) {
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c.InstanceName = instanceName
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}
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}
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// PersistAuthorization Persist authorization information over browser close/refresh.
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// Defaults to false.
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func PersistAuthorization(persistAuthorization bool) func(*Config) {
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return func(c *Config) {
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c.PersistAuthorization = persistAuthorization
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}
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}
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func OAuth(config *OAuthConfig) func(*Config) {
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return func(c *Config) {
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c.OAuth = config
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}
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}
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func newConfig(configFns ...func(*Config)) *Config {
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config := Config{
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URLs: []string{"doc.json", "doc.yaml"},
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DocExpansion: "list",
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DomID: "swagger-ui",
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InstanceName: "swagger",
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DeepLinking: true,
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PersistAuthorization: false,
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SyntaxHighlight: true,
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}
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for _, fn := range configFns {
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fn(&config)
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}
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if config.InstanceName == "" {
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config.InstanceName = swag.Name
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}
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return &config
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}
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// WrapHandler wraps swaggerFiles.Handler and returns echo.HandlerFunc
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var WrapHandler = EchoWrapHandler()
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// EchoWrapHandler wraps `http.Handler` into `echo.HandlerFunc`.
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func EchoWrapHandler(options ...func(*Config)) echo.HandlerFunc {
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config := newConfig(options...)
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// create a template with name
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index, _ := template.New("swagger_index.html").Parse(indexTemplate)
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var re = regexp.MustCompile(`^(.*/)([^?].*)?[?|.]*$`)
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return func(c echo.Context) error {
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if c.Request().Method != http.MethodGet {
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return echo.NewHTTPError(http.StatusMethodNotAllowed, http.StatusText(http.StatusMethodNotAllowed))
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}
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matches := re.FindStringSubmatch(c.Request().RequestURI)
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path := matches[2]
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switch filepath.Ext(path) {
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case ".html":
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c.Response().Header().Set("Content-Type", "text/html; charset=utf-8")
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case ".css":
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c.Response().Header().Set("Content-Type", "text/css; charset=utf-8")
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case ".js":
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c.Response().Header().Set("Content-Type", "application/javascript")
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case ".json":
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c.Response().Header().Set("Content-Type", "application/json; charset=utf-8")
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case ".yaml":
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c.Response().Header().Set("Content-Type", "text/plain; charset=utf-8")
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case ".png":
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c.Response().Header().Set("Content-Type", "image/png")
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}
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response := c.Response()
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// This check fixes an error introduced here: https://github.com/labstack/echo/blob/8da8e161380fd926d4341721f0328f1e94d6d0a2/response.go#L86-L88
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if _, ok := response.Writer.(http.Flusher); ok {
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defer response.Flush()
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}
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switch path {
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case "":
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_ = c.Redirect(http.StatusMovedPermanently, matches[1]+"/"+"index.html")
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case "index.html":
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_ = index.Execute(c.Response().Writer, config)
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case "doc.json":
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doc, err := swag.ReadDoc(config.InstanceName)
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if err != nil {
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c.Error(err)
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return nil
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}
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_, _ = c.Response().Writer.Write([]byte(doc))
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case "doc.yaml":
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jsonString, err := swag.ReadDoc(config.InstanceName)
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if err != nil {
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c.Error(err)
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return nil
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}
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doc, err := yaml.JSONToYAML([]byte(jsonString))
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if err != nil {
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c.Error(err)
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return nil
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}
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_, _ = c.Response().Writer.Write(doc)
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default:
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c.Request().URL.Path = matches[2]
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http.FileServer(http.FS(swaggerFiles.FS)).ServeHTTP(c.Response(), c.Request())
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}
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return nil
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}
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}
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const indexTemplate = `<!-- HTML for static distribution bundle build -->
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Swagger UI</title>
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<link rel="stylesheet" type="text/css" href="./swagger-ui.css" >
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<link rel="icon" type="image/png" href="./favicon-32x32.png" sizes="32x32" />
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<link rel="icon" type="image/png" href="./favicon-16x16.png" sizes="16x16" />
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<style>
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html
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{
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box-sizing: border-box;
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overflow: -moz-scrollbars-vertical;
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overflow-y: scroll;
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}
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*,
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*:before,
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*:after
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{
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box-sizing: inherit;
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}
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body {
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margin:0;
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background: #fafafa;
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}
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</style>
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</head>
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<body>
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<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" style="position:absolute;width:0;height:0">
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<defs>
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<symbol viewBox="0 0 20 20" id="unlocked">
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<path d="M15.8 8H14V5.6C14 2.703 12.665 1 10 1 7.334 1 6 2.703 6 5.6V6h2v-.801C8 3.754 8.797 3 10 3c1.203 0 2 .754 2 2.199V8H4c-.553 0-1 .646-1 1.199V17c0 .549.428 1.139.951 1.307l1.197.387C5.672 18.861 6.55 19 7.1 19h5.8c.549 0 1.428-.139 1.951-.307l1.196-.387c.524-.167.953-.757.953-1.306V9.199C17 8.646 16.352 8 15.8 8z"></path>
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</symbol>
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<symbol viewBox="0 0 20 20" id="locked">
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<path d="M15.8 8H14V5.6C14 2.703 12.665 1 10 1 7.334 1 6 2.703 6 5.6V8H4c-.553 0-1 .646-1 1.199V17c0 .549.428 1.139.951 1.307l1.197.387C5.672 18.861 6.55 19 7.1 19h5.8c.549 0 1.428-.139 1.951-.307l1.196-.387c.524-.167.953-.757.953-1.306V9.199C17 8.646 16.352 8 15.8 8zM12 8H8V5.199C8 3.754 8.797 3 10 3c1.203 0 2 .754 2 2.199V8z"/>
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</symbol>
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<symbol viewBox="0 0 20 20" id="close">
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<path d="M14.348 14.849c-.469.469-1.229.469-1.697 0L10 11.819l-2.651 3.029c-.469.469-1.229.469-1.697 0-.469-.469-.469-1.229 0-1.697l2.758-3.15-2.759-3.152c-.469-.469-.469-1.228 0-1.697.469-.469 1.228-.469 1.697 0L10 8.183l2.651-3.031c.469-.469 1.228-.469 1.697 0 .469.469.469 1.229 0 1.697l-2.758 3.152 2.758 3.15c.469.469.469 1.229 0 1.698z"/>
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</symbol>
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<symbol viewBox="0 0 20 20" id="large-arrow">
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<path d="M13.25 10L6.109 2.58c-.268-.27-.268-.707 0-.979.268-.27.701-.27.969 0l7.83 7.908c.268.271.268.709 0 .979l-7.83 7.908c-.268.271-.701.27-.969 0-.268-.269-.268-.707 0-.979L13.25 10z"/>
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</symbol>
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<symbol viewBox="0 0 20 20" id="large-arrow-down">
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<path d="M17.418 6.109c.272-.268.709-.268.979 0s.271.701 0 .969l-7.908 7.83c-.27.268-.707.268-.979 0l-7.908-7.83c-.27-.268-.27-.701 0-.969.271-.268.709-.268.979 0L10 13.25l7.418-7.141z"/>
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</symbol>
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<symbol viewBox="0 0 24 24" id="jump-to">
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<path d="M19 7v4H5.83l3.58-3.59L8 6l-6 6 6 6 1.41-1.41L5.83 13H21V7z"/>
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</symbol>
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<symbol viewBox="0 0 24 24" id="expand">
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<path d="M10 18h4v-2h-4v2zM3 6v2h18V6H3zm3 7h12v-2H6v2z"/>
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</symbol>
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</defs>
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</svg>
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<div id="{{.DomID}}"></div>
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<script src="./swagger-ui-bundle.js"> </script>
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<script src="./swagger-ui-standalone-preset.js"> </script>
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<script>
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window.onload = function() {
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// Build a system
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const ui = SwaggerUIBundle({
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urls: [
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{{range $index, $url := .URLs}}
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{
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name: "{{$url}}",
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url: "{{$url}}",
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},
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{{end}}
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],
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syntaxHighlight: {{.SyntaxHighlight}},
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deepLinking: {{.DeepLinking}},
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docExpansion: "{{.DocExpansion}}",
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persistAuthorization: {{.PersistAuthorization}},
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dom_id: "#{{.DomID}}",
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validatorUrl: null,
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presets: [
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SwaggerUIBundle.presets.apis,
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SwaggerUIStandalonePreset
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],
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plugins: [
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SwaggerUIBundle.plugins.DownloadUrl
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],
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layout: "StandaloneLayout"
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})
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{{if .OAuth}}
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ui.initOAuth({
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clientId: "{{.OAuth.ClientId}}",
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realm: "{{.OAuth.Realm}}",
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appName: "{{.OAuth.AppName}}"
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})
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{{end}}
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window.ui = ui
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}
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</script>
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</body>
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</html>
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`
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