Swagger spec gen

cmd/swaggergen/content.go

@@ -0,0 +1,26 @@
+package main
+
+import "net/http"
+
+// Content represents a content in the spec
+type Content struct {
+	Schema *Schema `json:"schema,omitempty" yaml:"schema,omitempty"`
+}
+
+// NewContent creates a new content
+func NewContent(res *http.Response) *Content {
+	var content *Content
+	if res.Body != nil {
+		content = &Content{
+			Schema: NewSchema(res.Body),
+		}
+	}
+	return content
+}
+
+// UpdateContent updates a content
+func (c *Content) UpdateContent(res *http.Response) {
+	if res.Body != nil {
+		c.Schema = NewSchema(res.Body)
+	}
+}

cmd/swaggergen/info.go

@@ -0,0 +1,15 @@
+package main
+
+type Info struct {
+	Title       string `json:"title,omitempty" yaml:"title,omitempty"`
+	Description string `json:"description,omitempty" yaml:"description,omitempty"`
+	Version     string `json:"version,omitempty" yaml:"version,omitempty"`
+}
+
+// NewInfo creates a new info
+func NewInfo(title string) *Info {
+	return &Info{
+		Title:   title,
+		Version: "1.0.0",
+	}
+}

cmd/swaggergen/method.go

@@ -0,0 +1,34 @@
+package main
+
+// Operation represents an operation in the spec
+type Method struct {
+	Summary    string            `json:"summary,omitempty" yaml:"summary,omitempty"`
+	Responses  map[int]*Response `json:"responses,omitempty" yaml:"responses,omitempty"`
+	Parameters []*Parameter      `json:"parameters,omitempty" yaml:"parameters,omitempty"`
+}
+
+// NewMethod creates a new method
+func NewMethod(reqRes RequestResponse) *Method {
+	method := &Method{
+		Responses:  map[int]*Response{},
+		Parameters: NewParameters(reqRes.Request),
+	}
+	if reqRes.Response != nil {
+		method.Responses = map[int]*Response{
+			reqRes.Response.StatusCode: NewResponse(reqRes.Response),
+		}
+	}
+	return method
+}
+
+// UpdateMethod updates a method
+func (m *Method) UpdateMethod(reqRes RequestResponse) {
+	if reqRes.Response != nil {
+		if _, ok := m.Responses[reqRes.Response.StatusCode]; !ok {
+			m.Responses[reqRes.Response.StatusCode] = NewResponse(reqRes.Response)
+		} else {
+			m.Responses[reqRes.Response.StatusCode].UpdateResponse(reqRes.Response)
+		}
+	}
+	m.Parameters = NewParameters(reqRes.Request)
+}

cmd/swaggergen/parameter.go

@@ -0,0 +1,42 @@
+package main
+
+import "net/http"
+
+// Parameter represents a parameter in the spec
+type Parameter struct {
+	Name        string  `json:"name,omitempty" yaml:"name,omitempty"`
+	In          string  `json:"in,omitempty" yaml:"in,omitempty"`
+	Description string  `json:"description,omitempty" yaml:"description,omitempty"`
+	Required    bool    `json:"required,omitempty" yaml:"required,omitempty"`
+	Schema      *Schema `json:"schema,omitempty" yaml:"schema,omitempty"`
+}
+
+// NewParameters creates a new parameters
+func NewParameters(req *http.Request) []*Parameter {
+	var params []*Parameter
+	if req.Body != nil {
+		// add body parameter
+		Schema := NewSchema(req.Body)
+		if Schema != nil {
+			params = append(params, &Parameter{
+				Name:     "body",
+				In:       "body",
+				Required: true,
+				Schema:   Schema,
+			})
+		}
+	}
+	// get request query parameters
+	reqParams := req.URL.Query()
+	// add query parameters
+	for key, value := range reqParams {
+		params = append(params, &Parameter{
+			Name:        key,
+			In:          "query",
+			Schema:      &Schema{Type: "string"},
+			Description: value[0],
+			Required:    true,
+		})
+	}
+	return params
+}

cmd/swaggergen/path.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"strings"
+)
+
+// Path represents a path in the spec
+type Path map[string]*Method
+
+// NewPath creates a new path
+func NewPath(reqRes RequestResponse) Path {
+	return map[string]*Method{
+		strings.ToLower(reqRes.Request.Method): NewMethod(reqRes),
+	}
+}
+
+// UpdatePath updates a path
+func (p Path) UpdatePath(reqRes RequestResponse) {
+	if _, ok := p[strings.ToLower(reqRes.Request.Method)]; !ok {
+		p[strings.ToLower(reqRes.Request.Method)] = NewMethod(reqRes)
+	} else {
+		p[strings.ToLower(reqRes.Request.Method)].UpdateMethod(reqRes)
+	}
+}

cmd/swaggergen/response.go

@@ -0,0 +1,33 @@
+package main
+
+import "net/http"
+
+// Response represents a response in the spec
+type Response struct {
+	Description string              `json:"description,omitempty" yaml:"description,omitempty"`
+	Content     map[string]*Content `json:"content,omitempty" yaml:"content,omitempty"`
+}
+
+// NewResponse creates a new response
+func NewResponse(res *http.Response) *Response {
+	var response *Response
+	if res.Header != nil {
+		response = &Response{
+			Content: map[string]*Content{
+				res.Header.Get("Content-Type"): NewContent(res),
+			},
+		}
+	}
+	return response
+}
+
+// UpdateResponse updates a response
+func (r *Response) UpdateResponse(res *http.Response) {
+	if res.Header != nil {
+		if _, ok := r.Content[res.Header.Get("Content-Type")]; !ok {
+			r.Content[res.Header.Get("Content-Type")] = NewContent(res)
+		} else {
+			r.Content[res.Header.Get("Content-Type")].UpdateContent(res)
+		}
+	}
+}

cmd/swaggergen/schema.go

@@ -0,0 +1,57 @@
+package main
+
+import (
+	"encoding/json"
+	"io"
+	"io/ioutil"
+)
+
+// Schema represents a schema in the spec
+type Schema struct {
+	Type        string             `json:"type" yaml:"type"`
+	Properties  map[string]*Schema `json:"properties,omitempty" yaml:"properties,omitempty"`
+	Description string             `json:"description" yaml:"description,omitempty"`
+}
+
+func NewSchema(reader io.Reader) *Schema {
+	body, err := ioutil.ReadAll(reader)
+	if err != nil {
+		return nil
+	}
+	var data interface{}
+	if err := json.Unmarshal(body, &data); err != nil {
+		return nil
+	}
+
+	dataType := InterfaceToType(data)
+	// generate shema from data map
+	schema := &Schema{
+		Type: dataType,
+	}
+	if dataType == "object" {
+		schema.Properties = make(map[string]*Schema)
+		for key, value := range data.(map[string]interface{}) {
+			schema.Properties[key] = &Schema{
+				Type: InterfaceToType(value),
+			}
+		}
+	}
+	return schema
+}
+
+func InterfaceToType(data interface{}) string {
+	switch data.(type) {
+	case map[string]interface{}:
+		return "object"
+	case []interface{}:
+		return "array"
+	case string:
+		return "string"
+	case float64:
+		return "number"
+	case bool:
+		return "boolean"
+	default:
+		return "notfound"
+	}
+}

cmd/swaggergen/servers.go

@@ -0,0 +1,14 @@
+package main
+
+type Server struct {
+	URL         string `json:"url,omitempty" yaml:"url,omitempty"`
+	Description string `json:"description,omitempty" yaml:"description,omitempty"`
+}
+
+// NewServer creates a new server
+func NewServer(url, description string) *Server {
+	return &Server{
+		URL:         url,
+		Description: description,
+	}
+}

cmd/swaggergen/spec.go

@@ -0,0 +1,31 @@
+package main
+
+const OpenApiVersion = "3.0.0"
+
+// Spec represents openapi 3 specification
+type Spec struct {
+	OpenApi string          `json:"openapi"`
+	Info    *Info           `json:"info"`
+	Servers []*Server       `json:"servers"`
+	Paths   map[string]Path `json:"paths"`
+}
+
+// NewSpec creates a new spec
+func NewSpec(logDir, api string) *Spec {
+	return &Spec{
+		OpenApi: OpenApiVersion,
+		Info:    NewInfo(logDir),
+		Servers: []*Server{NewServer(api, "")},
+		Paths:   map[string]Path{},
+	}
+}
+
+// AddRequest adds a request to the spec
+func (s *Spec) AddPath(reqRes RequestResponse) {
+	path := reqRes.Request.URL.Path
+	if _, ok := s.Paths[path]; !ok {
+		s.Paths[path] = NewPath(reqRes)
+	} else {
+		s.Paths[path].UpdatePath(reqRes)
+	}
+}