33 lines
762 B
Go
33 lines
762 B
Go
package httpapi
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import (
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"encoding/json"
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"errors"
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"io"
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"net/http"
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"github.com/gin-gonic/gin"
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)
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// bindJSON 严格解析 JSON 请求，并拒绝未知字段和多段 JSON。
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func bindJSON(c *gin.Context, target any, limit int64) error {
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if c == nil || c.Request == nil || c.Request.Body == nil {
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return errors.New("请求上下文或请求体为空")
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}
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if limit > 0 {
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c.Request.Body = http.MaxBytesReader(c.Writer, c.Request.Body, limit)
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}
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decoder := json.NewDecoder(c.Request.Body)
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decoder.DisallowUnknownFields()
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if err := decoder.Decode(target); err != nil {
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return err
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}
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if err := decoder.Decode(&struct{}{}); err != io.EOF {
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if err == nil {
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return errors.New("请求体包含多段 JSON 数据")
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}
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return err
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}
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return nil
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}
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