feat(bind): ShouldBindBodyWith shortcut and change doc (#3871)

* feat: ShouldBindBodyWith shortcut and change doc

* fix: yaml can parse json test case

* style: fix new test case in context_test.go

* chore: modify the code style to specify binding type

* chroe: gofmt modifies the code format

context.go

@@ -774,6 +774,26 @@ func (c *Context) ShouldBindBodyWith(obj any, bb binding.BindingBody) (err error
 	return bb.BindBody(body, obj)
 }
 
+// ShouldBindBodyWithJSON is a shortcut for c.ShouldBindBodyWith(obj, binding.JSON).
+func (c *Context) ShouldBindBodyWithJSON(obj any) error {
+	return c.ShouldBindBodyWith(obj, binding.JSON)
+}
+
+// ShouldBindBodyWithXML is a shortcut for c.ShouldBindBodyWith(obj, binding.XML).
+func (c *Context) ShouldBindBodyWithXML(obj any) error {
+	return c.ShouldBindBodyWith(obj, binding.XML)
+}
+
+// ShouldBindBodyWithYAML is a shortcut for c.ShouldBindBodyWith(obj, binding.YAML).
+func (c *Context) ShouldBindBodyWithYAML(obj any) error {
+	return c.ShouldBindBodyWith(obj, binding.YAML)
+}
+
+// ShouldBindBodyWithTOML is a shortcut for c.ShouldBindBodyWith(obj, binding.TOML).
+func (c *Context) ShouldBindBodyWithTOML(obj any) error {
+	return c.ShouldBindBodyWith(obj, binding.TOML)
+}
+
 // ClientIP implements one best effort algorithm to return the real client IP.
 // It calls c.RemoteIP() under the hood, to check if the remote IP is a trusted proxy or not.
 // If it is it will then try to parse the headers defined in Engine.RemoteIPHeaders (defaulting to [X-Forwarded-For, X-Real-Ip]).

context_test.go

@@ -1977,6 +1977,263 @@ func TestContextShouldBindBodyWith(t *testing.T) {
 	}
 }
 
+func TestContextShouldBindBodyWithJSON(t *testing.T) {
+	for _, tt := range []struct {
+		name        string
+		bindingBody binding.BindingBody
+		body        string
+	}{
+		{
+			name:        " JSON & JSON-BODY ",
+			bindingBody: binding.JSON,
+			body:        `{"foo":"FOO"}`,
+		},
+		{
+			name:        " JSON & XML-BODY ",
+			bindingBody: binding.XML,
+			body: `<?xml version="1.0" encoding="UTF-8"?>
+<root>
+<foo>FOO</foo>
+</root>`,
+		},
+		{
+			name:        " JSON & YAML-BODY ",
+			bindingBody: binding.YAML,
+			body:        `foo: FOO`,
+		},
+		{
+			name:        " JSON & TOM-BODY ",
+			bindingBody: binding.TOML,
+			body:        `foo=FOO`,
+		},
+	} {
+		t.Logf("testing: %s", tt.name)
+
+		w := httptest.NewRecorder()
+		c, _ := CreateTestContext(w)
+
+		c.Request, _ = http.NewRequest("POST", "/", bytes.NewBufferString(tt.body))
+
+		type typeJSON struct {
+			Foo string `json:"foo" binding:"required"`
+		}
+		objJSON := typeJSON{}
+
+		if tt.bindingBody == binding.JSON {
+			assert.NoError(t, c.ShouldBindBodyWithJSON(&objJSON))
+			assert.Equal(t, typeJSON{"FOO"}, objJSON)
+		}
+
+		if tt.bindingBody == binding.XML {
+			assert.Error(t, c.ShouldBindBodyWithJSON(&objJSON))
+			assert.Equal(t, typeJSON{}, objJSON)
+		}
+
+		if tt.bindingBody == binding.YAML {
+			assert.Error(t, c.ShouldBindBodyWithJSON(&objJSON))
+			assert.Equal(t, typeJSON{}, objJSON)
+		}
+
+		if tt.bindingBody == binding.TOML {
+			assert.Error(t, c.ShouldBindBodyWithJSON(&objJSON))
+			assert.Equal(t, typeJSON{}, objJSON)
+		}
+	}
+}
+
+func TestContextShouldBindBodyWithXML(t *testing.T) {
+	for _, tt := range []struct {
+		name        string
+		bindingBody binding.BindingBody
+		body        string
+	}{
+		{
+			name:        " XML & JSON-BODY ",
+			bindingBody: binding.JSON,
+			body:        `{"foo":"FOO"}`,
+		},
+		{
+			name:        " XML & XML-BODY ",
+			bindingBody: binding.XML,
+			body: `<?xml version="1.0" encoding="UTF-8"?>
+<root>
+<foo>FOO</foo>
+</root>`,
+		},
+		{
+			name:        " XML & YAML-BODY ",
+			bindingBody: binding.YAML,
+			body:        `foo: FOO`,
+		},
+		{
+			name:        " XML & TOM-BODY ",
+			bindingBody: binding.TOML,
+			body:        `foo=FOO`,
+		},
+	} {
+		t.Logf("testing: %s", tt.name)
+
+		w := httptest.NewRecorder()
+		c, _ := CreateTestContext(w)
+
+		c.Request, _ = http.NewRequest("POST", "/", bytes.NewBufferString(tt.body))
+
+		type typeXML struct {
+			Foo string `xml:"foo" binding:"required"`
+		}
+		objXML := typeXML{}
+
+		if tt.bindingBody == binding.JSON {
+			assert.Error(t, c.ShouldBindBodyWithXML(&objXML))
+			assert.Equal(t, typeXML{}, objXML)
+		}
+
+		if tt.bindingBody == binding.XML {
+			assert.NoError(t, c.ShouldBindBodyWithXML(&objXML))
+			assert.Equal(t, typeXML{"FOO"}, objXML)
+		}
+
+		if tt.bindingBody == binding.YAML {
+			assert.Error(t, c.ShouldBindBodyWithXML(&objXML))
+			assert.Equal(t, typeXML{}, objXML)
+		}
+
+		if tt.bindingBody == binding.TOML {
+			assert.Error(t, c.ShouldBindBodyWithXML(&objXML))
+			assert.Equal(t, typeXML{}, objXML)
+		}
+	}
+}
+
+func TestContextShouldBindBodyWithYAML(t *testing.T) {
+	for _, tt := range []struct {
+		name        string
+		bindingBody binding.BindingBody
+		body        string
+	}{
+		{
+			name:        " YAML & JSON-BODY ",
+			bindingBody: binding.JSON,
+			body:        `{"foo":"FOO"}`,
+		},
+		{
+			name:        " YAML & XML-BODY ",
+			bindingBody: binding.XML,
+			body: `<?xml version="1.0" encoding="UTF-8"?>
+<root>
+<foo>FOO</foo>
+</root>`,
+		},
+		{
+			name:        " YAML & YAML-BODY ",
+			bindingBody: binding.YAML,
+			body:        `foo: FOO`,
+		},
+		{
+			name:        " YAML & TOM-BODY ",
+			bindingBody: binding.TOML,
+			body:        `foo=FOO`,
+		},
+	} {
+		t.Logf("testing: %s", tt.name)
+
+		w := httptest.NewRecorder()
+		c, _ := CreateTestContext(w)
+
+		c.Request, _ = http.NewRequest("POST", "/", bytes.NewBufferString(tt.body))
+
+		type typeYAML struct {
+			Foo string `yaml:"foo" binding:"required"`
+		}
+		objYAML := typeYAML{}
+
+		// YAML belongs to a super collection of JSON, so JSON can be parsed by YAML
+		if tt.bindingBody == binding.JSON {
+			assert.NoError(t, c.ShouldBindBodyWithYAML(&objYAML))
+			assert.Equal(t, typeYAML{"FOO"}, objYAML)
+		}
+
+		if tt.bindingBody == binding.XML {
+			assert.Error(t, c.ShouldBindBodyWithYAML(&objYAML))
+			assert.Equal(t, typeYAML{}, objYAML)
+		}
+
+		if tt.bindingBody == binding.YAML {
+			assert.NoError(t, c.ShouldBindBodyWithYAML(&objYAML))
+			assert.Equal(t, typeYAML{"FOO"}, objYAML)
+		}
+
+		if tt.bindingBody == binding.TOML {
+			assert.Error(t, c.ShouldBindBodyWithYAML(&objYAML))
+			assert.Equal(t, typeYAML{}, objYAML)
+		}
+	}
+}
+
+func TestContextShouldBindBodyWithTOML(t *testing.T) {
+	for _, tt := range []struct {
+		name        string
+		bindingBody binding.BindingBody
+		body        string
+	}{
+		{
+			name:        " TOML & JSON-BODY ",
+			bindingBody: binding.JSON,
+			body:        `{"foo":"FOO"}`,
+		},
+		{
+			name:        " TOML & XML-BODY ",
+			bindingBody: binding.XML,
+			body: `<?xml version="1.0" encoding="UTF-8"?>
+<root>
+<foo>FOO</foo>
+</root>`,
+		},
+		{
+			name:        " TOML & YAML-BODY ",
+			bindingBody: binding.YAML,
+			body:        `foo: FOO`,
+		},
+		{
+			name:        " TOML & TOM-BODY ",
+			bindingBody: binding.TOML,
+			body:        `foo = 'FOO'`,
+		},
+	} {
+		t.Logf("testing: %s", tt.name)
+
+		w := httptest.NewRecorder()
+		c, _ := CreateTestContext(w)
+
+		c.Request, _ = http.NewRequest("POST", "/", bytes.NewBufferString(tt.body))
+
+		type typeTOML struct {
+			Foo string `toml:"foo" binding:"required"`
+		}
+		objTOML := typeTOML{}
+
+		if tt.bindingBody == binding.JSON {
+			assert.Error(t, c.ShouldBindBodyWithTOML(&objTOML))
+			assert.Equal(t, typeTOML{}, objTOML)
+		}
+
+		if tt.bindingBody == binding.XML {
+			assert.Error(t, c.ShouldBindBodyWithTOML(&objTOML))
+			assert.Equal(t, typeTOML{}, objTOML)
+		}
+
+		if tt.bindingBody == binding.YAML {
+			assert.Error(t, c.ShouldBindBodyWithTOML(&objTOML))
+			assert.Equal(t, typeTOML{}, objTOML)
+		}
+
+		if tt.bindingBody == binding.TOML {
+			assert.NoError(t, c.ShouldBindBodyWithTOML(&objTOML))
+			assert.Equal(t, typeTOML{"FOO"}, objTOML)
+		}
+	}
+}
+
 func TestContextGolangContext(t *testing.T) {
 	c, _ := CreateTestContext(httptest.NewRecorder())
 	c.Request, _ = http.NewRequest("POST", "/", bytes.NewBufferString("{\"foo\":\"bar\", \"bar\":\"foo\"}"))

docs/doc.md

@@ -1956,7 +1956,12 @@ func SomeHandler(c *gin.Context) {
 }
 ```
 
-For this, you can use `c.ShouldBindBodyWith`.
+For this, you can use `c.ShouldBindBodyWith` or shortcuts.
+
+- `c.ShouldBindBodyWithJSON` is a shortcut for c.ShouldBindBodyWith(obj, binding.JSON).
+- `c.ShouldBindBodyWithXML` is a shortcut for c.ShouldBindBodyWith(obj, binding.XML).
+- `c.ShouldBindBodyWithYAML` is a shortcut for c.ShouldBindBodyWith(obj, binding.YAML).
+- `c.ShouldBindBodyWithTOML` is a shortcut for c.ShouldBindBodyWith(obj, binding.TOML).
 
 ```go
 func SomeHandler(c *gin.Context) {
@@ -1969,7 +1974,7 @@ func SomeHandler(c *gin.Context) {
   } else if errB := c.ShouldBindBodyWith(&objB, binding.JSON); errB == nil {
     c.String(http.StatusOK, `the body should be formB JSON`)
   // And it can accepts other formats
-  } else if errB2 := c.ShouldBindBodyWith(&objB, binding.XML); errB2 == nil {
+  } else if errB2 := c.ShouldBindBodyWithXML(&objB); errB2 == nil {
     c.String(http.StatusOK, `the body should be formB XML`)
   } else {
     ...