bcupdate: make config flat, rewrite, simplify, test

This commit is contained in:
Adrien Marquès 2020-03-14 15:24:17 +01:00
parent acdba4121b
commit a6f5083f0d
Signed by: xdrm-brackets
GPG Key ID: D75243CA236D825E
10 changed files with 909 additions and 851 deletions

632
config/config_test.go Normal file
View File

@ -0,0 +1,632 @@
package config
import (
"errors"
"fmt"
"strings"
"testing"
)
func TestLegalServiceName(t *testing.T) {
tests := []struct {
Raw string
Error error
}{
// empty
{
`[ { "method": "GET", "info": "a", "path": "" } ]`,
ErrInvalidPattern,
},
{
`[ { "method": "GET", "info": "a", "path": "no-starting-slash" } ]`,
ErrInvalidPattern,
},
{
`[ { "method": "GET", "info": "a", "path": "ending-slash/" } ]`,
ErrInvalidPattern,
},
{
`[ { "method": "GET", "info": "a", "path": "/" } ]`,
nil,
},
{
`[ { "method": "GET", "info": "a", "path": "/valid-name" } ]`,
nil,
},
{
`[ { "method": "GET", "info": "a", "path": "/valid/nested/name" } ]`,
nil,
},
{
`[ { "method": "GET", "info": "a", "path": "/invalid/s{braces}" } ]`,
ErrInvalidPatternBracePosition,
},
{
`[ { "method": "GET", "info": "a", "path": "/invalid/{braces}a" } ]`,
ErrInvalidPatternBracePosition,
},
{
`[ { "method": "GET", "info": "a", "path": "/invalid/{braces}" } ]`,
nil,
},
{
`[ { "method": "GET", "info": "a", "path": "/invalid/s{braces}/abc" } ]`,
ErrInvalidPatternBracePosition,
},
{
`[ { "method": "GET", "info": "a", "path": "/invalid/{braces}s/abc" } ]`,
ErrInvalidPatternBracePosition,
},
{
`[ { "method": "GET", "info": "a", "path": "/invalid/{braces}/abc" } ]`,
nil,
},
{
`[ { "method": "GET", "info": "a", "path": "/invalid/{b{races}s/abc" } ]`,
ErrInvalidPatternOpeningBrace,
},
{
`[ { "method": "GET", "info": "a", "path": "/invalid/{braces}/}abc" } ]`,
ErrInvalidPatternClosingBrace,
},
}
for i, test := range tests {
t.Run(fmt.Sprintf("service.%d", i), func(t *testing.T) {
_, err := Parse(strings.NewReader(test.Raw))
if err == nil && test.Error != nil {
t.Errorf("expected an error: '%s'", test.Error.Error())
t.FailNow()
}
if err != nil && test.Error == nil {
t.Errorf("unexpected error: '%s'", err.Error())
t.FailNow()
}
if err != nil && test.Error != nil {
if !errors.Is(err, test.Error) {
t.Errorf("expected the error '%s' (got '%s')", test.Error.Error(), err.Error())
t.FailNow()
}
}
})
}
}
func TestAvailableMethods(t *testing.T) {
tests := []struct {
Raw string
ValidMethod bool
}{
{ // missing description
`[ { "method": "GET", "path": "/", "info": "valid-description" }]`,
true,
},
{ // missing description
`[ { "method": "POST", "path": "/", "info": "valid-description" }]`,
true,
},
{ // empty description
`[ { "method": "PUT", "path": "/", "info": "valid-description" }]`,
true,
},
{ // empty trimmed description
`[ { "method": "DELETE", "path": "/", "info": "valid-description" }]`,
true,
},
{ // valid description
`[ { "method": "get", "path": "/", "info": "valid-description" }]`,
false,
},
{ // valid description
`[ { "method": "UNknOwN", "path": "/", "info": "valid-description" }]`,
false,
},
}
for i, test := range tests {
t.Run(fmt.Sprintf("service.%d", i), func(t *testing.T) {
_, err := Parse(strings.NewReader(test.Raw))
if test.ValidMethod && err != nil {
t.Errorf("unexpected error: '%s'", err.Error())
t.FailNow()
}
if !test.ValidMethod && !errors.Is(err, ErrUnknownMethod) {
t.Errorf("expected error <%s> got <%s>", ErrUnknownMethod, err)
t.FailNow()
}
})
}
}
func TestParseEmpty(t *testing.T) {
reader := strings.NewReader(`[]`)
_, err := Parse(reader)
if err != nil {
t.Errorf("unexpected error (got '%s')", err)
t.FailNow()
}
}
func TestParseJsonError(t *testing.T) {
reader := strings.NewReader(`{
"GET": {
"info": "info
},
}`) // trailing ',' is invalid JSON
_, err := Parse(reader)
if err == nil {
t.Errorf("expected error")
t.FailNow()
}
}
func TestParseMissingMethodDescription(t *testing.T) {
tests := []struct {
Raw string
ValidDescription bool
}{
{ // missing description
`[ { "method": "GET", "path": "/" }]`,
false,
},
{ // missing description
`[ { "method": "GET", "path": "/subservice" }]`,
false,
},
{ // empty description
`[ { "method": "GET", "path": "/", "info": "" }]`,
false,
},
{ // empty trimmed description
`[ { "method": "GET", "path": "/", "info": " " }]`,
false,
},
{ // valid description
`[ { "method": "GET", "path": "/", "info": "a" }]`,
true,
},
{ // valid description
`[ { "method": "GET", "path": "/", "info": "some description" }]`,
true,
},
}
for i, test := range tests {
t.Run(fmt.Sprintf("method.%d", i), func(t *testing.T) {
_, err := Parse(strings.NewReader(test.Raw))
if test.ValidDescription && err != nil {
t.Errorf("unexpected error: '%s'", err)
t.FailNow()
}
if !test.ValidDescription && !errors.Is(err, ErrMissingDescription) {
t.Errorf("expected error <%s> got <%s>", ErrMissingDescription, err)
t.FailNow()
}
})
}
}
func TestParamEmptyRenameNoRename(t *testing.T) {
reader := strings.NewReader(`[
{
"method": "GET",
"path": "/",
"info": "valid-description",
"in": {
"original": { "info": "valid-desc", "type": "valid-type", "name": "" }
}
}
]`)
srv, err := Parse(reader)
if err != nil {
t.Errorf("unexpected error: '%s'", err)
t.FailNow()
}
if len(srv) < 1 {
t.Errorf("expected a service")
t.FailNow()
}
for _, param := range (srv)[0].Input {
if param.Rename != "original" {
t.Errorf("expected the parameter 'original' not to be renamed to '%s'", param.Rename)
t.FailNow()
}
}
}
func TestOptionalParam(t *testing.T) {
reader := strings.NewReader(`[
{
"method": "GET",
"path": "/",
"info": "valid-description",
"in": {
"optional": { "info": "valid-desc", "type": "?optional-type" },
"required": { "info": "valid-desc", "type": "required-type" },
"required2": { "info": "valid-desc", "type": "a" },
"optional2": { "info": "valid-desc", "type": "?a" }
}
}
]`)
srv, err := Parse(reader)
if err != nil {
t.Errorf("unexpected error: '%s'", err)
t.FailNow()
}
if len(srv) < 1 {
t.Errorf("expected a service")
t.FailNow()
}
for pName, param := range (srv)[0].Input {
if pName == "optional" || pName == "optional2" {
if !param.Optional {
t.Errorf("expected parameter '%s' to be optional", pName)
t.Failed()
}
}
if pName == "required" || pName == "required2" {
if param.Optional {
t.Errorf("expected parameter '%s' to be required", pName)
t.Failed()
}
}
}
}
func TestParseParameters(t *testing.T) {
tests := []struct {
Raw string
Error error
}{
{ // invalid param name prefix
`[
{
"method": "GET",
"path": "/",
"info": "info",
"in": {
"_param1": { }
}
}
]`,
ErrIllegalParamName,
},
{ // invalid param name suffix
`[
{
"method": "GET",
"path": "/",
"info": "info",
"in": {
"param1_": { }
}
}
]`,
ErrIllegalParamName,
},
{ // missing param description
`[
{
"method": "GET",
"path": "/",
"info": "info",
"in": {
"param1": { }
}
}
]`,
ErrMissingParamDesc,
},
{ // empty param description
`[
{
"method": "GET",
"path": "/",
"info": "info",
"in": {
"param1": { "info": "" }
}
}
]`,
ErrMissingParamDesc,
},
{ // missing param type
`[
{
"method": "GET",
"path": "/",
"info": "info",
"in": {
"param1": { "info": "valid" }
}
}
]`,
ErrMissingParamType,
},
{ // empty param type
`[
{
"method": "GET",
"path": "/",
"info": "info",
"in": {
"param1": { "info": "valid", "type": "" }
}
}
]`,
ErrMissingParamType,
},
{ // invalid type (optional mark only)
`[
{
"method": "GET",
"path": "/",
"info": "info",
"in": {
"param1": { "info": "valid", "type": "?" }
}
}
]`,
ErrMissingParamType,
},
{ // valid description + valid type
`[
{
"method": "GET",
"path": "/",
"info": "info",
"in": {
"param1": { "info": "valid", "type": "a" }
}
}
]`,
nil,
},
{ // valid description + valid OPTIONAL type
`[
{
"method": "GET",
"path": "/",
"info": "info",
"in": {
"param1": { "info": "valid", "type": "?valid" }
}
}
]`,
nil,
},
{ // name conflict with rename
`[
{
"method": "GET",
"path": "/",
"info": "info",
"in": {
"param1": { "info": "valid", "type": "valid" },
"param2": { "info": "valid", "type": "valid", "name": "param1" }
}
}
]`,
// 2 possible errors as map order is not deterministic
ErrParamNameConflict,
},
{ // rename conflict with name
`[
{
"method": "GET",
"path": "/",
"info": "info",
"in": {
"param1": { "info": "valid", "type": "valid", "name": "param2" },
"param2": { "info": "valid", "type": "valid" }
}
}
]`,
// 2 possible errors as map order is not deterministic
ErrParamNameConflict,
},
{ // rename conflict with rename
`[
{
"method": "GET",
"path": "/",
"info": "info",
"in": {
"param1": { "info": "valid", "type": "valid", "name": "conflict" },
"param2": { "info": "valid", "type": "valid", "name": "conflict" }
}
}
]`,
// 2 possible errors as map order is not deterministic
ErrParamNameConflict,
},
{ // both renamed with no conflict
`[
{
"method": "GET",
"path": "/",
"info": "info",
"in": {
"param1": { "info": "valid", "type": "valid", "name": "freename" },
"param2": { "info": "valid", "type": "valid", "name": "freename2" }
}
}
]`,
nil,
},
}
for i, test := range tests {
t.Run(fmt.Sprintf("method.%d", i), func(t *testing.T) {
_, err := Parse(strings.NewReader(test.Raw))
if err == nil && test.Error != nil {
t.Errorf("expected an error: '%s'", test.Error.Error())
t.FailNow()
}
if err != nil && test.Error == nil {
t.Errorf("unexpected error: '%s'", err.Error())
t.FailNow()
}
if err != nil && test.Error != nil {
if !errors.Is(err, test.Error) {
t.Errorf("expected the error <%s> got <%s>", test.Error, err)
t.FailNow()
}
}
})
}
}
// todo: rewrite with new api format
// func TestMatchSimple(t *testing.T) {
// tests := []struct {
// Raw string
// Path []string
// BrowseDepth int
// ValidDepth bool
// }{
// { // false positive -1
// `{
// "/" : {
// "parent": {
// "/": {
// "subdir": {}
// }
// }
// }
// }`,
// []string{"parent", "subdir"},
// 1,
// false,
// },
// { // false positive +1
// `{
// "/" : {
// "parent": {
// "/": {
// "subdir": {}
// }
// }
// }
// }`,
// []string{"parent", "subdir"},
// 3,
// false,
// },
// {
// `{
// "/" : {
// "parent": {
// "/": {
// "subdir": {}
// }
// }
// }
// }`,
// []string{"parent", "subdir"},
// 2,
// true,
// },
// { // unknown path
// `{
// "/" : {
// "parent": {
// "/": {
// "subdir": {}
// }
// }
// }
// }`,
// []string{"x", "y"},
// 2,
// false,
// },
// { // unknown path
// `{
// "/" : {
// "parent": {
// "/": {
// "subdir": {}
// }
// }
// }
// }`,
// []string{"parent", "y"},
// 1,
// true,
// },
// { // Warning: this case is important to understand the precedence of service paths over
// // the value of some variables. Here if we send a string parameter in the GET method that
// // unfortunately is equal to 'subdir', it will call the sub-service /parent/subdir' instead
// // of the service /parent with its parameter set to the value 'subdir'.
// `{
// "/" : {
// "parent": {
// "/": {
// "subdir": {}
// },
// "GET": {
// "info": "valid-desc",
// "in": {
// "some-value": {
// "info": "valid-desc",
// "type": "valid-type"
// }
// }
// }
// }
// }
// }`,
// []string{"parent", "subdir"},
// 2,
// true,
// },
// }
// for i, test := range tests {
// t.Run(fmt.Sprintf("method.%d", i), func(t *testing.T) {
// srv, err := Parse(strings.NewReader(test.Raw))
// if err != nil {
// t.Errorf("unexpected error: '%s'", err)
// t.FailNow()
// }
// _, depth := srv.Match(test.Path)
// if test.ValidDepth {
// if depth != test.BrowseDepth {
// t.Errorf("expected a depth of %d (got %d)", test.BrowseDepth, depth)
// t.FailNow()
// }
// } else {
// if depth == test.BrowseDepth {
// t.Errorf("expected a depth NOT %d (got %d)", test.BrowseDepth, depth)
// t.FailNow()
// }
// }
// })
// }
// }

48
config/errors.go Normal file
View File

@ -0,0 +1,48 @@
package config
// Error allows you to create constant "const" error with type boxing.
type Error string
// Error implements the error builtin interface.
func (err Error) Error() string {
return string(err)
}
// ErrRead - a problem ocurred when trying to read the configuration file
const ErrRead = Error("cannot read config")
// ErrUnknownMethod - invalid http method
const ErrUnknownMethod = Error("unknown HTTP method")
// ErrFormat - a invalid format has been detected
const ErrFormat = Error("invalid config format")
// ErrPatternCollision - there is a collision between 2 services' patterns (same method)
const ErrPatternCollision = Error("invalid config format")
// ErrInvalidPattern - a service pattern is malformed
const ErrInvalidPattern = Error("must begin with a '/' and not end with")
// ErrInvalidPatternBracePosition - a service pattern opening/closing brace is not directly between '/'
const ErrInvalidPatternBracePosition = Error("capturing braces must be alone between slashes")
// ErrInvalidPatternOpeningBrace - a service pattern opening brace is invalid
const ErrInvalidPatternOpeningBrace = Error("opening brace already open")
// ErrInvalidPatternClosingBrace - a service pattern closing brace is invalid
const ErrInvalidPatternClosingBrace = Error("closing brace already closed")
// ErrMissingDescription - a service is missing its description
const ErrMissingDescription = Error("missing description")
// ErrMissingParamDesc - a parameter is missing its description
const ErrMissingParamDesc = Error("missing parameter description")
// ErrIllegalParamName - a parameter has an illegal name
const ErrIllegalParamName = Error("parameter name must not begin/end with '_'")
// ErrMissingParamType - a parameter has an illegal type
const ErrMissingParamType = Error("missing parameter type")
// ErrParamNameConflict - a parameter has a conflict with its name/rename field
const ErrParamNameConflict = Error("name conflict for parameter")

22
config/parameter.go Normal file
View File

@ -0,0 +1,22 @@
package config
func (param *Parameter) checkAndFormat() error {
// missing description
if len(param.Description) < 1 {
return ErrMissingParamDesc
}
// invalid type
if len(param.Type) < 1 || param.Type == "?" {
return ErrMissingParamType
}
// set optional + type
if param.Type[0] == '?' {
param.Optional = true
param.Type = param.Type[1:]
}
return nil
}

116
config/service.go Normal file
View File

@ -0,0 +1,116 @@
package config
import (
"fmt"
"net/http"
"strings"
)
// Match returns if this service would handle this HTTP request
func (svc *Service) Match(req *http.Request) bool {
return false
}
func (svc *Service) checkMethod() error {
for _, available := range availableHTTPMethods {
if svc.Method == available {
return nil
}
}
return ErrUnknownMethod
}
func (svc *Service) checkPattern() error {
length := len(svc.Pattern)
// empty pattern
if length < 1 {
return ErrInvalidPattern
}
if length > 1 {
// pattern not starting with '/' or ending with '/'
if svc.Pattern[0] != '/' || svc.Pattern[length-1] == '/' {
return ErrInvalidPattern
}
}
// check capturing braces
depth := 0
for c, l := 1, length; c < l; c++ {
char := svc.Pattern[c]
if char == '{' {
// opening brace when already opened
if depth != 0 {
return ErrInvalidPatternOpeningBrace
}
// not directly preceded by a slash
if svc.Pattern[c-1] != '/' {
return ErrInvalidPatternBracePosition
}
depth++
}
if char == '}' {
// closing brace when already closed
if depth != 1 {
return ErrInvalidPatternClosingBrace
}
// not directly followed by a slash or end of pattern
if c+1 < l && svc.Pattern[c+1] != '/' {
return ErrInvalidPatternBracePosition
}
depth--
}
}
return nil
}
func (svc *Service) checkAndFormatInput() error {
// ignore no parameter
if svc.Input == nil || len(svc.Input) < 1 {
svc.Input = make(map[string]*Parameter, 0)
return nil
}
// for each parameter
for paramName, param := range svc.Input {
// fail on invalid name
if strings.Trim(paramName, "_") != paramName {
return fmt.Errorf("%s: %w", paramName, ErrIllegalParamName)
}
// use param name if no rename
if len(param.Rename) < 1 {
param.Rename = paramName
}
err := param.checkAndFormat()
if err != nil {
return fmt.Errorf("%s: %w", paramName, err)
}
// check for name/rename conflict
for paramName2, param2 := range svc.Input {
// ignore self
if paramName == paramName2 {
continue
}
// 3.2.1. Same rename field
// 3.2.2. Not-renamed field matches a renamed field
// 3.2.3. Renamed field matches name
if param.Rename == param2.Rename || paramName == param2.Rename || paramName2 == param.Rename {
return fmt.Errorf("%s: %w", paramName, ErrParamNameConflict)
}
}
}
return nil
}

79
config/services.go Normal file
View File

@ -0,0 +1,79 @@
package config
import (
"encoding/json"
"fmt"
"io"
"net/http"
"strings"
)
// Parse builds a server configuration from a json reader and checks for most format errors.
func Parse(r io.Reader) (Services, error) {
services := make(Services, 0)
err := json.NewDecoder(r).Decode(&services)
if err != nil {
return nil, fmt.Errorf("%s: %w", ErrRead, err)
}
err = services.checkAndFormat()
if err != nil {
return nil, fmt.Errorf("%s: %w", ErrFormat, err)
}
if services.collide() {
return nil, fmt.Errorf("%s: %w", ErrFormat, ErrPatternCollision)
}
return services, nil
}
// collide returns if there is collision between services
func (svc Services) collide() bool {
// todo: implement pattern collision using types to check if braces can be equal to fixed uri parts
return false
}
// Find a service matching an incoming HTTP request
func (svc Services) Find(r *http.Request) *Service {
for _, service := range svc {
if service.Match(r) {
return service
}
}
return nil
}
// checkAndFormat checks for errors and missing fields and sets default values for optional fields.
func (svc Services) checkAndFormat() error {
for _, service := range svc {
// check method
err := service.checkMethod()
if err != nil {
return fmt.Errorf("%s '%s' [method]: %w", service.Method, service.Pattern, err)
}
// check pattern
service.Pattern = strings.Trim(service.Pattern, " \t\r\n")
err = service.checkPattern()
if err != nil {
return fmt.Errorf("%s '%s' [path]: %w", service.Method, service.Pattern, err)
}
// check description
if len(strings.Trim(service.Description, " \t\r\n")) < 1 {
return fmt.Errorf("%s '%s' [description]: %w", service.Method, service.Pattern, ErrMissingDescription)
}
// check input parameters
err = service.checkAndFormatInput()
if err != nil {
return fmt.Errorf("%s '%s' [in]: %w", service.Method, service.Pattern, err)
}
}
return nil
}

View File

@ -4,29 +4,26 @@ import "net/http"
var availableHTTPMethods = []string{http.MethodGet, http.MethodPost, http.MethodPut, http.MethodDelete} var availableHTTPMethods = []string{http.MethodGet, http.MethodPost, http.MethodPut, http.MethodDelete}
// Service represents a service definition (from api.json)
type Service struct {
GET *Method `json:"GET"`
POST *Method `json:"POST"`
PUT *Method `json:"PUT"`
DELETE *Method `json:"DELETE"`
Children map[string]*Service `json:"/"`
}
// Parameter represents a parameter definition (from api.json) // Parameter represents a parameter definition (from api.json)
type Parameter struct { type Parameter struct {
Description string `json:"info"` Description string `json:"info"`
Type string `json:"type"` Type string `json:"type"`
Rename string `json:"name,omitempty"` Rename string `json:"name,omitempty"`
Optional bool Optional bool
Default *interface{} `json:"default"` // Default *interface{} `json:"default"`
} }
// Method represents a method definition (from api.json) // Service represents a service definition (from api.json)
type Method struct { type Service struct {
Description string `json:"info"` Method string `json:"method"`
Pattern string `json:"path"`
Scope [][]string `json:"scope"` Scope [][]string `json:"scope"`
Parameters map[string]*Parameter `json:"in"` Description string `json:"info"`
Download *bool `json:"download"` Download *bool `json:"download"`
Input map[string]*Parameter `json:"in"`
// Output map[string]*Parameter `json:"out"`
} }
// Services contains every service that represents a server configuration
type Services []*Service

View File

@ -1,636 +0,0 @@
package config
import (
"fmt"
"net/http"
"strings"
"testing"
)
func TestLegalServiceName(t *testing.T) {
tests := []struct {
Raw string
Error error
}{
{
`{
"/": {
"invalid/service-name": {
}
}
}`,
ErrFormat.Wrap(ErrIllegalServiceName.WrapString("invalid/service-name")),
},
{
`{
"/": {
"invalid/service/name": {
}
}
}`,
ErrFormat.Wrap(ErrIllegalServiceName.WrapString("invalid/service/name")),
},
{
`{
"/": {
"invalid-service-name": {
}
}
}`,
ErrFormat.Wrap(ErrIllegalServiceName.WrapString("invalid-service-name")),
},
{
`{
"/": {
"valid.service_name": {
}
}
}`,
nil,
},
}
for i, test := range tests {
t.Run(fmt.Sprintf("service.%d", i), func(t *testing.T) {
_, err := Parse(strings.NewReader(test.Raw))
if err == nil && test.Error != nil {
t.Errorf("expected an error: '%s'", test.Error.Error())
t.FailNow()
}
if err != nil && test.Error == nil {
t.Errorf("unexpected error: '%s'", err.Error())
t.FailNow()
}
if err != nil && test.Error != nil {
if err.Error() != test.Error.Error() {
t.Errorf("expected the error '%s' (got '%s')", test.Error.Error(), err.Error())
t.FailNow()
}
}
})
}
}
func TestAvailableMethods(t *testing.T) {
reader := strings.NewReader(`{
"GET": { "info": "info" },
"POST": { "info": "info" },
"PUT": { "info": "info" },
"DELETE": { "info": "info" }
}`)
srv, err := Parse(reader)
if err != nil {
t.Errorf("unexpected error (got '%s')", err)
t.FailNow()
}
if srv.Method(http.MethodGet) == nil {
t.Errorf("expected method GET to be available")
t.Fail()
}
if srv.Method(http.MethodPost) == nil {
t.Errorf("expected method POST to be available")
t.Fail()
}
if srv.Method(http.MethodPut) == nil {
t.Errorf("expected method PUT to be available")
t.Fail()
}
if srv.Method(http.MethodDelete) == nil {
t.Errorf("expected method DELETE to be available")
t.Fail()
}
if srv.Method(http.MethodPatch) != nil {
t.Errorf("expected method PATH to be UNavailable")
t.Fail()
}
}
func TestParseEmpty(t *testing.T) {
reader := strings.NewReader(`{}`)
_, err := Parse(reader)
if err != nil {
t.Errorf("unexpected error (got '%s')", err)
t.FailNow()
}
}
func TestParseJsonError(t *testing.T) {
reader := strings.NewReader(`{
"GET": {
"info": "info
},
}`) // trailing ',' is invalid JSON
_, err := Parse(reader)
if err == nil {
t.Errorf("expected error")
t.FailNow()
}
}
func TestParseMissingMethodDescription(t *testing.T) {
tests := []struct {
Raw string
Error error
}{
{ // missing description
`{
"GET": {
}
}`,
ErrFormat.Wrap(ErrMissingMethodDesc.WrapString("GET /")),
},
{ // missing description
`{
"/": {
"subservice": {
"GET": {
}
}
}
}`,
ErrFormat.Wrap(ErrMissingMethodDesc.WrapString("GET subservice")),
},
{ // empty description
`{
"GET": {
"info": ""
}
}`,
ErrFormat.Wrap(ErrMissingMethodDesc.WrapString("GET /")),
},
{ // valid description
`{
"GET": {
"info": "a"
}
}`,
nil,
},
{ // valid description
`{
"GET": {
"info": "some description"
}
}`,
nil,
},
}
for i, test := range tests {
t.Run(fmt.Sprintf("method.%d", i), func(t *testing.T) {
_, err := Parse(strings.NewReader(test.Raw))
if err == nil && test.Error != nil {
t.Errorf("expected an error: '%s'", test.Error.Error())
t.FailNow()
}
if err != nil && test.Error == nil {
t.Errorf("unexpected error: '%s'", err.Error())
t.FailNow()
}
if err != nil && test.Error != nil {
if err.Error() != test.Error.Error() {
t.Errorf("expected the error '%s' (got '%s')", test.Error.Error(), err.Error())
t.FailNow()
}
}
})
}
}
func TestParamEmptyRenameNoRename(t *testing.T) {
reader := strings.NewReader(`{
"GET": {
"info": "info",
"in": {
"original": { "info": "valid-desc", "type": "valid-type", "name": "" }
}
}
}`)
srv, err := Parse(reader)
if err != nil {
t.Errorf("unexpected error: '%s'", err)
t.FailNow()
}
method := srv.Method(http.MethodGet)
if method == nil {
t.Errorf("expected GET method not to be nil")
t.FailNow()
}
for _, param := range method.Parameters {
if param.Rename != "original" {
t.Errorf("expected the parameter 'original' not to be renamed to '%s'", param.Rename)
t.FailNow()
}
}
}
func TestOptionalParam(t *testing.T) {
reader := strings.NewReader(`{
"GET": {
"info": "info",
"in": {
"optional": { "info": "valid-desc", "type": "?optional-type" },
"required": { "info": "valid-desc", "type": "required-type" },
"required2": { "info": "valid-desc", "type": "a" },
"optional2": { "info": "valid-desc", "type": "?a" }
}
}
}`)
srv, err := Parse(reader)
if err != nil {
t.Errorf("unexpected error: '%s'", err)
t.FailNow()
}
method := srv.Method(http.MethodGet)
if method == nil {
t.Errorf("expected GET method not to be nil")
t.FailNow()
}
for pName, param := range method.Parameters {
if pName == "optional" || pName == "optional2" {
if !param.Optional {
t.Errorf("expected parameter '%s' to be optional", pName)
t.Failed()
}
}
if pName == "required" || pName == "required2" {
if param.Optional {
t.Errorf("expected parameter '%s' to be required", pName)
t.Failed()
}
}
}
}
func TestParseParameters(t *testing.T) {
tests := []struct {
Raw string
Error error
ErrorAlternative error
}{
{ // invalid param name prefix
`{
"GET": {
"info": "info",
"in": {
"_param1": {}
}
}
}`,
ErrFormat.Wrap(ErrIllegalParamName.WrapString("GET / {_param1}")),
nil,
},
{ // invalid param name suffix
`{
"GET": {
"info": "info",
"in": {
"param1_": {}
}
}
}`,
ErrFormat.Wrap(ErrIllegalParamName.WrapString("GET / {param1_}")),
nil,
},
{ // missing param description
`{
"GET": {
"info": "info",
"in": {
"param1": {}
}
}
}`,
ErrFormat.Wrap(ErrMissingParamDesc.WrapString("GET / {param1}")),
nil,
},
{ // empty param description
`{
"GET": {
"info": "info",
"in": {
"param1": {
"info": ""
}
}
}
}`,
ErrFormat.Wrap(ErrMissingParamDesc.WrapString("GET / {param1}")),
nil,
},
{ // missing param type
`{
"GET": {
"info": "info",
"in": {
"param1": {
"info": "valid"
}
}
}
}`,
ErrFormat.Wrap(ErrMissingParamType.WrapString("GET / {param1}")),
nil,
},
{ // empty param type
`{
"GET": {
"info": "info",
"in": {
"param1": {
"info": "valid",
"type": ""
}
}
}
}`,
ErrFormat.Wrap(ErrMissingParamType.WrapString("GET / {param1}")),
nil,
},
{ // invalid type (optional mark only)
`{
"GET": {
"info": "info",
"in": {
"param1": {
"info": "valid",
"type": "?"
}
}
}
}`,
ErrFormat.Wrap(ErrMissingParamType.WrapString("GET / {param1}")),
ErrFormat.Wrap(ErrMissingParamType.WrapString("GET / {param1}")),
},
{ // valid description + valid type
`{
"GET": {
"info": "info",
"in": {
"param1": {
"info": "valid",
"type": "a"
}
}
}
}`,
nil,
nil,
},
{ // valid description + valid OPTIONAL type
`{
"GET": {
"info": "info",
"in": {
"param1": {
"info": "valid",
"type": "?valid"
}
}
}
}`,
nil,
nil,
},
{ // name conflict with rename
`{
"GET": {
"info": "info",
"in": {
"param1": { "info": "valid", "type": "valid" },
"param2": { "info": "valid", "type": "valid", "name": "param1" }
}
}
}`,
// 2 possible errors as map order is not deterministic
ErrFormat.Wrap(ErrParamNameConflict.WrapString("GET / {param1}")),
ErrFormat.Wrap(ErrParamNameConflict.WrapString("GET / {param2}")),
},
{ // rename conflict with name
`{
"GET": {
"info": "info",
"in": {
"param1": { "info": "valid", "type": "valid", "name": "param2" },
"param2": { "info": "valid", "type": "valid" }
}
}
}`,
// 2 possible errors as map order is not deterministic
ErrFormat.Wrap(ErrParamNameConflict.WrapString("GET / {param1}")),
ErrFormat.Wrap(ErrParamNameConflict.WrapString("GET / {param2}")),
},
{ // rename conflict with rename
`{
"GET": {
"info": "info",
"in": {
"param1": { "info": "valid", "type": "valid", "name": "conflict" },
"param2": { "info": "valid", "type": "valid", "name": "conflict" }
}
}
}`,
// 2 possible errors as map order is not deterministic
ErrFormat.Wrap(ErrParamNameConflict.WrapString("GET / {param1}")),
ErrFormat.Wrap(ErrParamNameConflict.WrapString("GET / {param2}")),
},
{ // both renamed with no conflict
`{
"GET": {
"info": "info",
"in": {
"param1": { "info": "valid", "type": "valid", "name": "freename" },
"param2": { "info": "valid", "type": "valid", "name": "freename2" }
}
}
}`,
nil,
nil,
},
}
for i, test := range tests {
t.Run(fmt.Sprintf("method.%d", i), func(t *testing.T) {
_, err := Parse(strings.NewReader(test.Raw))
if err == nil && test.Error != nil {
t.Errorf("expected an error: '%s'", test.Error.Error())
t.FailNow()
}
if err != nil && test.Error == nil {
t.Errorf("unexpected error: '%s'", err.Error())
t.FailNow()
}
if err != nil && test.Error != nil {
if err.Error() != test.Error.Error() && err.Error() != test.ErrorAlternative.Error() {
t.Errorf("got the error: '%s'", err.Error())
t.Errorf("expected error (alternative 1): '%s'", test.Error.Error())
t.Errorf("expected error (alternative 2): '%s'", test.ErrorAlternative.Error())
t.FailNow()
}
}
})
}
}
func TestBrowseSimple(t *testing.T) {
tests := []struct {
Raw string
Path []string
BrowseDepth int
ValidDepth bool
}{
{ // false positive -1
`{
"/" : {
"parent": {
"/": {
"subdir": {}
}
}
}
}`,
[]string{"parent", "subdir"},
1,
false,
},
{ // false positive +1
`{
"/" : {
"parent": {
"/": {
"subdir": {}
}
}
}
}`,
[]string{"parent", "subdir"},
3,
false,
},
{
`{
"/" : {
"parent": {
"/": {
"subdir": {}
}
}
}
}`,
[]string{"parent", "subdir"},
2,
true,
},
{ // unknown path
`{
"/" : {
"parent": {
"/": {
"subdir": {}
}
}
}
}`,
[]string{"x", "y"},
2,
false,
},
{ // unknown path
`{
"/" : {
"parent": {
"/": {
"subdir": {}
}
}
}
}`,
[]string{"parent", "y"},
1,
true,
},
{ // Warning: this case is important to understand the precedence of service paths over
// the value of some variables. Here if we send a string parameter in the GET method that
// unfortunately is equal to 'subdir', it will call the sub-service /parent/subdir' instead
// of the service /parent with its parameter set to the value 'subdir'.
`{
"/" : {
"parent": {
"/": {
"subdir": {}
},
"GET": {
"info": "valid-desc",
"in": {
"some-value": {
"info": "valid-desc",
"type": "valid-type"
}
}
}
}
}
}`,
[]string{"parent", "subdir"},
2,
true,
},
}
for i, test := range tests {
t.Run(fmt.Sprintf("method.%d", i), func(t *testing.T) {
srv, err := Parse(strings.NewReader(test.Raw))
if err != nil {
t.Errorf("unexpected error: '%s'", err)
t.FailNow()
}
_, depth := srv.Browse(test.Path)
if test.ValidDepth {
if depth != test.BrowseDepth {
t.Errorf("expected a depth of %d (got %d)", test.BrowseDepth, depth)
t.FailNow()
}
} else {
if depth == test.BrowseDepth {
t.Errorf("expected a depth NOT %d (got %d)", test.BrowseDepth, depth)
t.FailNow()
}
}
})
}
}

View File

@ -1,27 +0,0 @@
package config
import "git.xdrm.io/go/aicra/internal/cerr"
// ErrRead - a problem ocurred when trying to read the configuration file
const ErrRead = cerr.Error("cannot read config")
// ErrFormat - a invalid format has been detected
const ErrFormat = cerr.Error("invalid config format")
// ErrIllegalServiceName - an illegal character has been found in a service name
const ErrIllegalServiceName = cerr.Error("service must not contain any slash '/' nor '-' symbols")
// ErrMissingMethodDesc - a method is missing its description
const ErrMissingMethodDesc = cerr.Error("missing method description")
// ErrMissingParamDesc - a parameter is missing its description
const ErrMissingParamDesc = cerr.Error("missing parameter description")
// ErrIllegalParamName - a parameter has an illegal name
const ErrIllegalParamName = cerr.Error("illegal parameter name (must not begin/end with '_')")
// ErrMissingParamType - a parameter has an illegal type
const ErrMissingParamType = cerr.Error("missing parameter type")
// ErrParamNameConflict - a parameter has a conflict with its name/rename field
const ErrParamNameConflict = cerr.Error("name conflict for parameter")

View File

@ -1,69 +0,0 @@
package config
import (
"strings"
)
// checkAndFormat checks for errors and missing fields and sets default values for optional fields.
func (methodDef *Method) checkAndFormat(servicePath string, httpMethod string) error {
// 1. fail on missing description
if len(methodDef.Description) < 1 {
return ErrMissingMethodDesc.WrapString(httpMethod + " " + servicePath)
}
// 2. stop if no parameter
if methodDef.Parameters == nil || len(methodDef.Parameters) < 1 {
methodDef.Parameters = make(map[string]*Parameter, 0)
return nil
}
// 3. for each parameter
for pName, pData := range methodDef.Parameters {
// 3.1. check name
if strings.Trim(pName, "_") != pName {
return ErrIllegalParamName.WrapString(httpMethod + " " + servicePath + " {" + pName + "}")
}
if len(pData.Rename) < 1 {
pData.Rename = pName
}
// 3.2. Check for name/rename conflict
for paramName, param := range methodDef.Parameters {
// ignore self
if pName == paramName {
continue
}
// 3.2.1. Same rename field
// 3.2.2. Not-renamed field matches a renamed field
// 3.2.3. Renamed field matches name
if pData.Rename == param.Rename || pName == param.Rename || pData.Rename == paramName {
return ErrParamNameConflict.WrapString(httpMethod + " " + servicePath + " {" + pName + "}")
}
}
// 3.3. Fail on missing description
if len(pData.Description) < 1 {
return ErrMissingParamDesc.WrapString(httpMethod + " " + servicePath + " {" + pName + "}")
}
// 3.4. Manage invalid type
if len(pData.Type) < 1 || pData.Type == "?" {
return ErrMissingParamType.WrapString(httpMethod + " " + servicePath + " {" + pName + "}")
}
// 3.5. Set optional + type
if pData.Type[0] == '?' {
pData.Optional = true
pData.Type = pData.Type[1:]
}
}
return nil
}

View File

@ -1,104 +0,0 @@
package config
import (
"encoding/json"
"io"
"net/http"
"strings"
)
// Parse builds a service from a json reader and checks for most format errors.
func Parse(r io.Reader) (*Service, error) {
receiver := &Service{}
err := json.NewDecoder(r).Decode(receiver)
if err != nil {
return nil, ErrRead.Wrap(err)
}
err = receiver.checkAndFormat("/")
if err != nil {
return nil, ErrFormat.Wrap(err)
}
return receiver, nil
}
// Method returns the actual method from the http method.
func (svc *Service) Method(httpMethod string) *Method {
httpMethod = strings.ToUpper(httpMethod)
switch httpMethod {
case http.MethodGet:
return svc.GET
case http.MethodPost:
return svc.POST
case http.MethodPut:
return svc.PUT
case http.MethodDelete:
return svc.DELETE
}
return nil
}
// Browse the service childtree and returns the deepest matching child. The `path` is a formatted URL split by '/'
func (svc *Service) Browse(path []string) (*Service, int) {
currentService := svc
var depth int
// for each URI depth
for depth = 0; depth < len(path); depth++ {
currentPath := path[depth]
child, exists := currentService.Children[currentPath]
if !exists {
break
}
currentService = child
}
return currentService, depth
}
// checkAndFormat checks for errors and missing fields and sets default values for optional fields.
func (svc *Service) checkAndFormat(servicePath string) error {
// 1. check and format every method
for _, httpMethod := range availableHTTPMethods {
methodDef := svc.Method(httpMethod)
if methodDef == nil {
continue
}
err := methodDef.checkAndFormat(servicePath, httpMethod)
if err != nil {
return err
}
}
// 2. stop if no child */
if svc.Children == nil || len(svc.Children) < 1 {
return nil
}
// 3. for each service */
for childService, ctl := range svc.Children {
// 3.1. invalid name */
if strings.ContainsAny(childService, "/-") {
return ErrIllegalServiceName.WrapString(childService)
}
// 3.2. check recursively */
err := ctl.checkAndFormat(childService)
if err != nil {
return err
}
}
return nil
}