Decouple the different contexts from each other (#24786)

Replace #16455

Close #21803

Mixing different Gitea contexts together causes some problems:

1. Unable to respond proper content when error occurs, eg: Web should
respond HTML while API should respond JSON
2. Unclear dependency, eg: it's unclear when Context is used in
APIContext, which fields should be initialized, which methods are
necessary.


To make things clear, this PR introduces a Base context, it only
provides basic Req/Resp/Data features.

This PR mainly moves code. There are still many legacy problems and
TODOs in code, leave unrelated changes to future PRs.

services/forms/user_form.go

@@ -78,7 +78,7 @@ type InstallForm struct {
 
 // Validate validates the fields
 func (f *InstallForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -99,7 +99,7 @@ type RegisterForm struct {
 
 // Validate validates the fields
 func (f *RegisterForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -148,7 +148,7 @@ type MustChangePasswordForm struct {
 
 // Validate validates the fields
 func (f *MustChangePasswordForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -162,7 +162,7 @@ type SignInForm struct {
 
 // Validate validates the fields
 func (f *SignInForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -182,7 +182,7 @@ type AuthorizationForm struct {
 
 // Validate validates the fields
 func (f *AuthorizationForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -197,7 +197,7 @@ type GrantApplicationForm struct {
 
 // Validate validates the fields
 func (f *GrantApplicationForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -216,7 +216,7 @@ type AccessTokenForm struct {
 
 // Validate validates the fields
 func (f *AccessTokenForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -227,7 +227,7 @@ type IntrospectTokenForm struct {
 
 // Validate validates the fields
 func (f *IntrospectTokenForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -252,7 +252,7 @@ type UpdateProfileForm struct {
 
 // Validate validates the fields
 func (f *UpdateProfileForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -263,7 +263,7 @@ type UpdateLanguageForm struct {
 
 // Validate validates the fields
 func (f *UpdateLanguageForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -283,7 +283,7 @@ type AvatarForm struct {
 
 // Validate validates the fields
 func (f *AvatarForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -294,7 +294,7 @@ type AddEmailForm struct {
 
 // Validate validates the fields
 func (f *AddEmailForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -305,7 +305,7 @@ type UpdateThemeForm struct {
 
 // Validate validates the field
 func (f *UpdateThemeForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -332,7 +332,7 @@ type ChangePasswordForm struct {
 
 // Validate validates the fields
 func (f *ChangePasswordForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -343,7 +343,7 @@ type AddOpenIDForm struct {
 
 // Validate validates the fields
 func (f *AddOpenIDForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -360,7 +360,7 @@ type AddKeyForm struct {
 
 // Validate validates the fields
 func (f *AddKeyForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -372,7 +372,7 @@ type AddSecretForm struct {
 
 // Validate validates the fields
 func (f *AddSecretForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -384,7 +384,7 @@ type NewAccessTokenForm struct {
 
 // Validate validates the fields
 func (f *NewAccessTokenForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -403,7 +403,7 @@ type EditOAuth2ApplicationForm struct {
 
 // Validate validates the fields
 func (f *EditOAuth2ApplicationForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -414,7 +414,7 @@ type TwoFactorAuthForm struct {
 
 // Validate validates the fields
 func (f *TwoFactorAuthForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -425,7 +425,7 @@ type TwoFactorScratchAuthForm struct {
 
 // Validate validates the fields
 func (f *TwoFactorScratchAuthForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -436,7 +436,7 @@ type WebauthnRegistrationForm struct {
 
 // Validate validates the fields
 func (f *WebauthnRegistrationForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -447,7 +447,7 @@ type WebauthnDeleteForm struct {
 
 // Validate validates the fields
 func (f *WebauthnDeleteForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
@@ -459,6 +459,6 @@ type PackageSettingForm struct {
 
 // Validate validates the fields
 func (f *PackageSettingForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetContext(req)
+	ctx := context.GetValidateContext(req)
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }