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request.go
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request.go
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package stgin
import (
"encoding/json"
"encoding/xml"
"io"
"io/ioutil"
"mime/multipart"
"net/http"
"time"
)
type RequestContext struct {
Url string
QueryParams map[string][]string
PathParams map[string]string
Headers http.Header
Body *RequestBody
receivedAt time.Time
Method string
ContentLength int64
Host string
MultipartForm func() *multipart.Form
Scheme string
RemoteAddr string
}
func (c RequestContext) GetPathParam(name string) (string, bool) {
var res string
var found bool
for paramName, value := range c.PathParams {
if paramName == name {
found = true
res = value
break
}
}
return res, found
}
func (c RequestContext) GetQueries(name string) []string {
var res []string
for queryName, values := range c.QueryParams {
if queryName == name {
res = values
}
}
return res
}
func (c RequestContext) GetQuery(name string) (string, bool) {
allValues := c.GetQueries(name)
if len(allValues) == 1 {
return allValues[0], true
} else {
return "", false
}
}
type RequestBody struct {
underlying io.Reader
underlyingBytes []byte
hasFilledBytes bool
}
func bodyFromBytes(bytes []byte) *RequestBody {
return &RequestBody{
underlying: nil,
underlyingBytes: bytes,
hasFilledBytes: true,
}
}
func bodyFromReader(reader io.Reader) *RequestBody {
return &RequestBody{
underlying: reader,
underlyingBytes: nil,
hasFilledBytes: false,
}
}
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")
return
}
}(reader)
bytes, err := ioutil.ReadAll(reader)
if err != nil {
return nil, err
} else {
return bodyFromBytes(bytes), nil
}
}
func (body *RequestBody) fillAndGetBytes() ([]byte, *MalformedRequestContext) {
if body.hasFilledBytes {
return body.underlyingBytes, nil
} else {
bytes, err := ioutil.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(),
})
}
}