-
Notifications
You must be signed in to change notification settings - Fork 3
/
requestbody.go
executable file
·396 lines (333 loc) · 9.23 KB
/
requestbody.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
// Code generated by Speakeasy (https://speakeasyapi.dev). DO NOT EDIT.
package utils
import (
"bytes"
"context"
"fmt"
"io"
"mime/multipart"
"net/url"
"reflect"
"regexp"
)
const (
requestTagKey = "request"
multipartFormTagKey = "multipartForm"
formTagKey = "form"
)
var (
jsonEncodingRegex = regexp.MustCompile(`(application|text)\/.*?\+*json.*`)
multipartEncodingRegex = regexp.MustCompile(`multipart\/.*`)
urlEncodedEncodingRegex = regexp.MustCompile(`application\/x-www-form-urlencoded.*`)
)
func SerializeRequestBody(ctx context.Context, request interface{}, nullable, optional bool, requestFieldName, serializationMethod, tag string) (io.Reader, string, error) {
requestStructType := reflect.TypeOf(request)
requestValType := reflect.ValueOf(request)
if isNil(requestStructType, requestValType) {
if optional || !nullable {
return nil, "", nil
}
return serializeContentType(requestFieldName, SerializationMethodToContentType[serializationMethod], requestValType, tag)
}
if requestStructType.Kind() == reflect.Pointer {
requestStructType = requestStructType.Elem()
requestValType = requestValType.Elem()
}
if requestStructType.Kind() != reflect.Struct {
return serializeContentType(requestFieldName, SerializationMethodToContentType[serializationMethod], requestValType, tag)
}
requestField, ok := requestStructType.FieldByName(requestFieldName)
if ok {
tag := getRequestTag(requestField)
if tag != nil {
// request object (non-flattened)
requestVal := requestValType.FieldByName(requestFieldName)
if isNil(requestField.Type, requestVal) {
if optional || !nullable {
return nil, "", nil
}
return serializeContentType(requestFieldName, SerializationMethodToContentType[serializationMethod], requestVal, tag.MediaType)
}
return serializeContentType(requestFieldName, tag.MediaType, requestVal, string(requestField.Tag))
}
}
// flattened request object
return serializeContentType(requestFieldName, SerializationMethodToContentType[serializationMethod], reflect.ValueOf(request), tag)
}
func serializeContentType(fieldName string, mediaType string, val reflect.Value, tag string) (*bytes.Buffer, string, error) {
buf := &bytes.Buffer{}
if isNil(val.Type(), val) {
// TODO: what does a null mean for other content types? Just returning an empty buffer for now
if jsonEncodingRegex.MatchString(mediaType) {
if _, err := buf.Write([]byte("null")); err != nil {
return nil, "", err
}
}
return buf, mediaType, nil
}
switch {
case jsonEncodingRegex.MatchString(mediaType):
data, err := MarshalJSON(val.Interface(), reflect.StructTag(tag), true)
if err != nil {
return nil, "", err
}
if _, err := buf.Write(data); err != nil {
return nil, "", err
}
case multipartEncodingRegex.MatchString(mediaType):
var err error
mediaType, err = encodeMultipartFormData(buf, val.Interface())
if err != nil {
return nil, "", err
}
case urlEncodedEncodingRegex.MatchString(mediaType):
if err := encodeFormData(fieldName, buf, val.Interface()); err != nil {
return nil, "", err
}
default:
val = reflect.Indirect(val)
switch {
case val.Type().Kind() == reflect.String:
if _, err := buf.WriteString(valToString(val.Interface())); err != nil {
return nil, "", err
}
case val.Type() == reflect.TypeOf([]byte(nil)):
if _, err := buf.Write(val.Bytes()); err != nil {
return nil, "", err
}
default:
return nil, "", fmt.Errorf("invalid request body type %s for mediaType %s", val.Type(), mediaType)
}
}
return buf, mediaType, nil
}
func encodeMultipartFormData(w io.Writer, data interface{}) (string, error) {
requestStructType := reflect.TypeOf(data)
requestValType := reflect.ValueOf(data)
if requestStructType.Kind() == reflect.Pointer {
requestStructType = requestStructType.Elem()
requestValType = requestValType.Elem()
}
writer := multipart.NewWriter(w)
for i := 0; i < requestStructType.NumField(); i++ {
field := requestStructType.Field(i)
fieldType := field.Type
valType := requestValType.Field(i)
if isNil(fieldType, valType) {
continue
}
if fieldType.Kind() == reflect.Pointer {
fieldType = fieldType.Elem()
valType = valType.Elem()
}
tag := parseMultipartFormTag(field)
if tag.File {
if err := encodeMultipartFormDataFile(writer, fieldType, valType); err != nil {
writer.Close()
return "", err
}
} else if tag.JSON {
jw, err := writer.CreateFormField(tag.Name)
if err != nil {
writer.Close()
return "", err
}
d, err := MarshalJSON(valType.Interface(), field.Tag, true)
if err != nil {
writer.Close()
return "", err
}
if _, err := jw.Write(d); err != nil {
writer.Close()
return "", err
}
} else {
switch fieldType.Kind() {
case reflect.Slice, reflect.Array:
values := parseDelimitedArray(true, valType, ",")
for _, v := range values {
if err := writer.WriteField(tag.Name+"[]", v); err != nil {
writer.Close()
return "", err
}
}
default:
if err := writer.WriteField(tag.Name, valToString(valType.Interface())); err != nil {
writer.Close()
return "", err
}
}
}
}
if err := writer.Close(); err != nil {
return "", err
}
return writer.FormDataContentType(), nil
}
func encodeMultipartFormDataFile(w *multipart.Writer, fieldType reflect.Type, valType reflect.Value) error {
if fieldType.Kind() != reflect.Struct {
return fmt.Errorf("invalid type %s for multipart/form-data file", valType.Type())
}
var fieldName string
var fileName string
var content []byte
for i := 0; i < fieldType.NumField(); i++ {
field := fieldType.Field(i)
val := valType.Field(i)
tag := parseMultipartFormTag(field)
if !tag.Content && tag.Name == "" {
continue
}
if tag.Content {
content = val.Bytes()
} else {
fieldName = tag.Name
fileName = val.String()
}
}
if fieldName == "" || fileName == "" || content == nil {
return fmt.Errorf("invalid multipart/form-data file")
}
fw, err := w.CreateFormFile(fieldName, fileName)
if err != nil {
return err
}
if _, err := fw.Write(content); err != nil {
return err
}
return nil
}
func encodeFormData(fieldName string, w io.Writer, data interface{}) error {
requestType := reflect.TypeOf(data)
requestValType := reflect.ValueOf(data)
if requestType.Kind() == reflect.Pointer {
requestType = requestType.Elem()
requestValType = requestValType.Elem()
}
dataValues := url.Values{}
switch requestType.Kind() {
case reflect.Struct:
for i := 0; i < requestType.NumField(); i++ {
field := requestType.Field(i)
fieldType := field.Type
valType := requestValType.Field(i)
if isNil(fieldType, valType) {
continue
}
if fieldType.Kind() == reflect.Pointer {
fieldType = fieldType.Elem()
valType = valType.Elem()
}
tag := parseFormTag(field)
if tag.JSON {
data, err := MarshalJSON(valType.Interface(), field.Tag, true)
if err != nil {
return err
}
dataValues.Set(tag.Name, string(data))
} else {
switch tag.Style {
// TODO: support other styles
case "form":
values := populateForm(tag.Name, tag.Explode, fieldType, valType, ",", func(sf reflect.StructField) string {
tag := parseFormTag(field)
if tag == nil {
return ""
}
return tag.Name
})
for k, v := range values {
for _, vv := range v {
dataValues.Add(k, vv)
}
}
}
}
}
case reflect.Map:
for _, k := range requestValType.MapKeys() {
v := requestValType.MapIndex(k)
dataValues.Set(fmt.Sprintf("%v", k.Interface()), valToString(v.Interface()))
}
case reflect.Slice, reflect.Array:
for i := 0; i < requestValType.Len(); i++ {
v := requestValType.Index(i)
dataValues.Set(fieldName, valToString(v.Interface()))
}
}
if _, err := w.Write([]byte(dataValues.Encode())); err != nil {
return err
}
return nil
}
type requestTag struct {
MediaType string
}
func getRequestTag(field reflect.StructField) *requestTag {
// example `request:"mediaType=multipart/form-data"`
values := parseStructTag(requestTagKey, field)
if values == nil {
return nil
}
tag := &requestTag{
MediaType: "application/octet-stream",
}
for k, v := range values {
switch k {
case "mediaType":
tag.MediaType = v
}
}
return tag
}
type multipartFormTag struct {
File bool
Content bool
JSON bool
Name string
}
func parseMultipartFormTag(field reflect.StructField) *multipartFormTag {
// example `multipartForm:"name=file"`
values := parseStructTag(multipartFormTagKey, field)
tag := &multipartFormTag{}
for k, v := range values {
switch k {
case "file":
tag.File = v == "true"
case "content":
tag.Content = v == "true"
case "name":
tag.Name = v
case "json":
tag.JSON = v == "true"
}
}
return tag
}
type formTag struct {
Name string
JSON bool
Style string
Explode bool
}
func parseFormTag(field reflect.StructField) *formTag {
// example `form:"name=propName,style=spaceDelimited,explode"`
values := parseStructTag(formTagKey, field)
tag := &formTag{
Style: "form",
Explode: true,
}
for k, v := range values {
switch k {
case "name":
tag.Name = v
case "json":
tag.JSON = v == "true"
case "style":
tag.Style = v
case "explode":
tag.Explode = v == "true"
}
}
return tag
}