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request.go
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request.go
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package stgin
import (
"encoding/json"
"encoding/xml"
"io"
"mime/multipart"
"net/http"
"time"
)
type RequestContext struct {
Url string
QueryParams Queries
PathParams PathParams
Headers http.Header
Trailer http.Header
Body func() *RequestBody
receivedAt time.Time
Method string
ContentLength int64
Host string
MultipartForm func() *multipart.Form
Scheme string
RemoteAddr string
underlying *http.Request
HttpPush Push
}
type Push struct {
IsSupported bool
pusher http.Pusher
}
func (p Push) Pusher() http.Pusher {
if !p.IsSupported {
panic("pusher is not supported in the request")
}
return p.pusher
}
func (c RequestContext) Cookies() []*http.Cookie {
return c.underlying.Cookies()
}
func (c RequestContext) Referer() string { return c.underlying.Referer() }
func (c RequestContext) UserAgent() string { return c.underlying.UserAgent() }
func (c RequestContext) Cookie(name string) (*http.Cookie, error) {
return c.underlying.Cookie(name)
}
func (c RequestContext) FormValue(key string) string {
return c.underlying.FormValue(key)
}
func (c RequestContext) FormFile(key string) (multipart.File, *multipart.FileHeader, error) {
return c.underlying.FormFile(key)
}
func (c RequestContext) PostFormValue(key string) string {
return c.underlying.PostFormValue(key)
}
func (c RequestContext) ParseMultipartForm(maxMemory int64) error {
return c.underlying.ParseMultipartForm(maxMemory)
}
func (c RequestContext) Form() (map[string][]string, error) {
if err := c.underlying.ParseForm(); err != nil {
return nil, err
}
return c.underlying.Form, nil
}
func (c RequestContext) PostForm() (map[string][]string, error) {
if err := c.underlying.ParseForm(); err != nil {
return nil, err
} else {
return c.underlying.PostForm, nil
}
}
func (c RequestContext) AddCookie(cookie *http.Cookie) {
c.underlying.AddCookie(cookie)
}
type RequestBody struct {
underlying io.Reader
underlyingBytes []byte
hasFilledBytes bool
}
func bodyFromBytes(bytes []byte) *RequestBody {
return &RequestBody{
underlying: nil,
underlyingBytes: bytes,
hasFilledBytes: true,
}
}
func bodyFromReadCloser(reader io.ReadCloser) (*RequestBody, error) {
defer func(r io.ReadCloser) {
err := r.Close()
if err != nil {
_ = stginLogger.Err("could not close reader stream from request")
}
}(reader)
bytes, err := io.ReadAll(reader)
if err != nil {
return nil, err
} else {
return bodyFromBytes(bytes), nil
}
}
func requestContextFromHttpRequest(request *http.Request, writer http.ResponseWriter, pathParams Params) RequestContext {
var pusher http.Pusher
var isSupported bool
if writer != nil {
pusher, isSupported = writer.(http.Pusher)
}
var headers http.Header
if request.Header == nil {
headers = emptyHeaders
} else {
headers = request.Header
}
return RequestContext{
Url: request.URL.Path,
QueryParams: Queries{request.URL.Query()},
PathParams: PathParams{pathParams},
Headers: headers,
Trailer: request.Trailer,
Body: func() *RequestBody {
var body *RequestBody
if request.Body != nil {
body, _ = bodyFromReadCloser(request.Body)
}
return body
},
receivedAt: time.Now(),
Method: request.Method,
ContentLength: request.ContentLength,
Host: request.Host,
MultipartForm: func() *multipart.Form {
return request.MultipartForm
},
Scheme: request.URL.Scheme,
RemoteAddr: request.RemoteAddr,
underlying: request,
HttpPush: Push{
IsSupported: isSupported,
pusher: pusher,
},
}
}
func (body *RequestBody) fillAndGetBytes() ([]byte, *MalformedRequestContext) {
if body.hasFilledBytes {
return body.underlyingBytes, nil
} else {
bytes, err := io.ReadAll(body.underlying)
if err != nil {
return []byte{}, &MalformedRequestContext{details: err.Error()}
}
body.underlyingBytes = bytes
body.hasFilledBytes = true
return bytes, nil
}
}
func (body *RequestBody) SafeJSONInto(a any) error {
bytes, err := body.fillAndGetBytes()
if err != nil {
return *err
}
if unmarshalErr := json.Unmarshal(bytes, a); unmarshalErr != nil {
return ParseError{
tpe: "JSON",
details: unmarshalErr.Error(),
}
} else {
return nil
}
}
func (body *RequestBody) SafeXMLInto(a any) error {
bytes, err := body.fillAndGetBytes()
if err != nil {
return *err
}
if unmarshalErr := xml.Unmarshal(bytes, a); unmarshalErr != nil {
return ParseError{
tpe: "XML",
details: unmarshalErr.Error(),
}
} else {
return nil
}
}
func (body *RequestBody) JSONInto(a any) {
bytes, err := body.fillAndGetBytes()
if err != nil {
panic(err)
}
if unmarshalErr := json.Unmarshal(bytes, a); unmarshalErr != nil {
panic(ParseError{details: err.Error(), tpe: "JSON"})
}
}
func (body *RequestBody) XMLInto(a any) {
bytes, err := body.fillAndGetBytes()
if err != nil {
panic(err)
}
if unmarshalErr := xml.Unmarshal(bytes, a); unmarshalErr != nil {
panic(ParseError{
tpe: "XML",
details: err.Error(),
})
}
}