/
main.go
187 lines (177 loc) · 5.21 KB
/
main.go
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package main
import (
"encoding/json"
"fmt"
"github.com/Kong/go-pdk"
"github.com/Kong/go-pdk/log"
"github.com/Kong/go-pdk/server"
"github.com/getkin/kin-openapi/openapi3"
"github.com/ludovic-pourrat/kong-api-catalog-harvester/factories"
"github.com/ludovic-pourrat/kong-api-catalog-harvester/types"
"github.com/ludovic-pourrat/kong-api-catalog-harvester/utils"
"github.com/ludovic-pourrat/kong-api-catalog-harvester/utils/pathtrie"
"github.com/patrickmn/go-cache"
"net/url"
"strings"
"time"
)
var Version = "0.0.1"
var Priority = 1
var requests = cache.New(5*time.Minute, 10*time.Minute)
var responses = cache.New(5*time.Minute, 10*time.Minute)
var specs = make(map[string]*openapi3.T) // FIXME add mutex
var registeredPaths = pathtrie.New() // FIXME add mutex
type Config struct {
PluginActive *bool `json:"active"`
}
func New() interface{} {
_ = utils.Init()
return &Config{}
}
func (conf Config) Active() bool {
if conf.PluginActive != nil {
return *conf.PluginActive
}
return false
}
func (conf Config) Response(kong *pdk.PDK) {
logger := kong.Log
id, err := kong.Request.GetHeader("Kong-Request-ID")
if err != nil {
_ = logger.Err("Error getting unique request id: ", err.Error())
return
}
request, err := kong.Request.GetRawBody()
if err != nil {
_ = logger.Err(err)
return
}
requests.SetDefault(id, &request)
response, err := kong.ServiceResponse.GetRawBody()
if err != nil {
_ = logger.Err(err)
return
}
responses.SetDefault(id, &response)
}
func (conf Config) Log(kong *pdk.PDK) {
if !conf.Active() {
return
}
logger := kong.Log
// get and parse log message
rawLog, err := kong.Log.Serialize()
if err != nil {
_ = logger.Err("Error getting log message: ", err.Error())
return
}
id, err := kong.Request.GetHeader("Kong-Request-ID")
if err != nil {
_ = logger.Err("Error getting unique request id: ", err.Error())
return
}
// retrieve request and response from cache
rawRequest, _ := requests.Get(id)
defer requests.Delete(id)
rawResponse, _ := responses.Get(id)
defer responses.Delete(id)
process(&rawLog, rawRequest.(*[]byte), rawResponse.(*string), kong.Log)
//os.WriteFile("/logs/log.log", []byte(rawLog), 0644) TODO remove
}
func process(rawLog *string, rawRequest *[]byte, rawResponse *string, logger log.Log) {
var captured types.Log
var updated = false
// build
if err := json.Unmarshal([]byte(*rawLog), &captured); err != nil {
_ = logger.Err("Error unmarshalling log message: ", err.Error())
return
}
// URL
u, err := url.Parse(captured.UpstreamURI)
if err != nil {
_ = logger.Err(err)
return
}
// content Type
var contentType string
if _, found := captured.Request.Headers["content-type"]; found {
contentType = captured.Request.Headers["content-type"].(string)
} else {
contentType = "application/json"
}
// search specification
if _, found := specs[captured.Service.Name]; !found {
specs[captured.Service.Name] = factories.BuildSpecification(captured.Service.Name, "3.0.0")
} else {
specs[captured.Service.Name] = factories.CloneSpecification(specs[captured.Service.Name],
registeredPaths)
}
var name string
// match
matched, route, err := match(captured.Request.Method, u.Path, contentType, specs[captured.Service.Name])
if !matched {
var computed string
// computed
if strings.EqualFold(err.Error(), "method not allowed") {
computed = factories.CreateParameterizedPath(route)
} else {
computed = factories.CreateParameterizedPath(u.Path)
}
// parameters
params := factories.BuildParams(computed, u.Path, captured, logger)
// request
operationRequest := factories.BuildRequest(*rawRequest, contentType, captured)
// response
operationResponse := factories.BuildResponses(*rawResponse, captured)
// operation
name = utils.GetName(captured.Request.Method, strings.Split(computed, "/"))
operation := &openapi3.Operation{
OperationID: name,
Parameters: params,
RequestBody: operationRequest,
Responses: operationResponse,
}
registeredPaths.Insert(computed, u.Path, operation, captured.Request.Method, 1)
updated = true
} else {
var updatedRequest, updatedResponses bool
// merge
name = utils.GetName(captured.Request.Method, strings.Split(route, "/"))
for _, path := range registeredPaths.Nodes() {
for _, operation := range path.Operations {
if operation.OperationID == name {
updatedParams := factories.MergeParams(operation, route, u.Path, captured, logger)
updatedRequest, err = factories.MergeRequest(operation, *rawRequest, contentType, captured)
if err != nil {
_ = logger.Err(err)
return
}
updatedResponses, err = factories.MergeResponses(operation, *rawResponse, captured)
if err != nil {
_ = logger.Err(err)
return
}
if updatedParams || updatedRequest || updatedResponses {
updated = true
}
}
}
}
}
if updated {
specs[captured.Service.Name] = factories.CloneSpecification(specs[captured.Service.Name],
registeredPaths)
err = utils.Write(captured.Service.Name, specs[captured.Service.Name])
if err != nil {
_ = logger.Err(err)
}
}
return
}
func main() {
err := server.StartServer(New, Version, Priority)
if err != nil {
fmt.Println("Error starting embedded plugin server:", err.Error())
panic(err)
}
}