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112 lines
2.4 KiB
Go
112 lines
2.4 KiB
Go
package httpx
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import (
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"io"
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"net/http"
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"strings"
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"github.com/tal-tech/go-zero/core/mapping"
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"github.com/tal-tech/go-zero/rest/internal/context"
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)
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const (
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multipartFormData = "multipart/form-data"
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formKey = "form"
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pathKey = "path"
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emptyJson = "{}"
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maxMemory = 32 << 20 // 32MB
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maxBodyLen = 8 << 20 // 8MB
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separator = ";"
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tokensInAttribute = 2
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)
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var (
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formUnmarshaler = mapping.NewUnmarshaler(formKey, mapping.WithStringValues())
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pathUnmarshaler = mapping.NewUnmarshaler(pathKey, mapping.WithStringValues())
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)
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func Parse(r *http.Request, v interface{}) error {
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if err := ParsePath(r, v); err != nil {
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return err
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}
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if err := ParseForm(r, v); err != nil {
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return err
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}
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return ParseJsonBody(r, v)
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}
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// Parses the form request.
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func ParseForm(r *http.Request, v interface{}) error {
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if strings.Index(r.Header.Get(ContentType), multipartFormData) != -1 {
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if err := r.ParseMultipartForm(maxMemory); err != nil {
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return err
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}
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} else {
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if err := r.ParseForm(); err != nil {
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return err
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}
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}
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params := make(map[string]interface{}, len(r.Form))
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for name := range r.Form {
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formValue := r.Form.Get(name)
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if len(formValue) > 0 {
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params[name] = formValue
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}
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}
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return formUnmarshaler.Unmarshal(params, v)
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}
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func ParseHeader(headerValue string) map[string]string {
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ret := make(map[string]string)
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fields := strings.Split(headerValue, separator)
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for _, field := range fields {
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field = strings.TrimSpace(field)
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if len(field) == 0 {
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continue
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}
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kv := strings.SplitN(field, "=", tokensInAttribute)
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if len(kv) != tokensInAttribute {
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continue
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}
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ret[kv[0]] = kv[1]
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}
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return ret
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}
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// Parses the post request which contains json in body.
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func ParseJsonBody(r *http.Request, v interface{}) error {
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var reader io.Reader
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if withJsonBody(r) {
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reader = io.LimitReader(r.Body, maxBodyLen)
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} else {
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reader = strings.NewReader(emptyJson)
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}
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return mapping.UnmarshalJsonReader(reader, v)
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}
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// Parses the symbols reside in url path.
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// Like http://localhost/bag/:name
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func ParsePath(r *http.Request, v interface{}) error {
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vars := context.Vars(r)
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m := make(map[string]interface{}, len(vars))
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for k, v := range vars {
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m[k] = v
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}
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return pathUnmarshaler.Unmarshal(m, v)
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}
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func withJsonBody(r *http.Request) bool {
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return r.ContentLength > 0 && strings.Index(r.Header.Get(ContentType), ApplicationJson) != -1
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}
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