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rewrite url serfivce

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This commit is contained in:
Asim Aslam
2021-12-11 20:23:24 +00:00
parent bba608b405
commit 088f3f7a52
3 changed files with 118 additions and 141 deletions
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124
url/handler/url.go
View File

@@ -2,59 +2,47 @@ package handler
import (
"context"
"errors"
"strings"
"time"
"github.com/micro/micro/v3/service/config"
"github.com/micro/micro/v3/service/logger"
"github.com/micro/micro/v3/service/model"
cache "github.com/patrickmn/go-cache"
"github.com/teris-io/shortid"
"github.com/micro/micro/v3/service/errors"
"github.com/micro/micro/v3/service/store"
"github.com/micro/services/pkg/tenant"
url "github.com/micro/services/url/proto"
cache "github.com/patrickmn/go-cache"
"github.com/teris-io/shortid"
)
const hostPrefix = "https://m3o.one/u/"
type Url struct {
pairs model.Model
ownerIndex model.Index
cache *cache.Cache
hostPrefix string
}
func NewUrl() *Url {
var hp string
cfg, err := config.Get("micro.url.host_prefix")
if err != nil {
hp = cfg.String(hostPrefix)
}
if len(strings.TrimSpace(hp)) == 0 {
hp = hostPrefix
}
ownerIndex := model.ByEquality("owner")
ownerIndex.Order.Type = model.OrderTypeUnordered
m := model.NewModel(
model.WithKey("shortURL"),
model.WithIndexes(ownerIndex),
)
m.Register(&url.URLPair{})
return &Url{
pairs: m,
ownerIndex: ownerIndex,
hostPrefix: hp,
cache: cache.New(cache.NoExpiration, cache.NoExpiration),
hostPrefix: hp,
}
}
func (e *Url) Shorten(ctx context.Context, req *url.ShortenRequest, rsp *url.ShortenResponse) error {
tenantID, ok := tenant.FromContext(ctx)
tenantId, ok := tenant.FromContext(ctx)
if !ok {
return errors.New("Not authorized")
return errors.Unauthorized("url.shorten", "not authorized")
}
sid, err := shortid.New(1, shortid.DefaultABC, 2342)
if err != nil {
@@ -66,75 +54,83 @@ func (e *Url) Shorten(ctx context.Context, req *url.ShortenRequest, rsp *url.Sho
return err
}
p := &url.URLPair{
val := &url.URLPair{
DestinationURL: req.DestinationURL,
ShortURL: id,
Owner: tenantID,
Created: time.Now().Unix(),
ShortURL: e.hostPrefix + id,
Created: time.Now().Format(time.RFC3339Nano),
}
rsp.ShortURL = e.hostPrefix + id
return e.pairs.Create(p)
// write a global key
key := "url/" + id
if err := store.Write(store.NewRecord(key, val)); err != nil {
return err
}
// write per owner key
key = "urlOwner/" + tenantId + "/" + id
if err := store.Write(store.NewRecord(key, val)); err != nil {
return err
}
return nil
}
func (e *Url) List(ctx context.Context, req *url.ListRequest, rsp *url.ListResponse) error {
tenantID, ok := tenant.FromContext(ctx)
tenantId, ok := tenant.FromContext(ctx)
if !ok {
return errors.New("Not authorized")
return errors.Unauthorized("url.shorten", "not authorized")
}
rsp.UrlPairs = []*url.URLPair{}
rsp.Urls = []*url.URLPair{}
var err error
if req.ShortURL != "" {
err = e.pairs.Read(model.QueryEquals("shortURL", req.ShortURL), &rsp.UrlPairs)
key := "urlOwner/" + tenantId + "/"
var opts []store.ReadOption
if len(req.ShortURL) > 0 {
id := strings.Replace(req.ShortURL, e.hostPrefix, "", -1)
key += id
} else {
err = e.pairs.Read(e.ownerIndex.ToQuery(tenantID), &rsp.UrlPairs)
opts = append(opts, store.ReadPrefix())
}
records, err := store.Read(key, opts...)
if err != nil {
return err
}
for _, v := range rsp.UrlPairs {
// get the counter and add it to db value to improve
// accuracy
// A thing to keep in mind is that in memory cache hits
// from other nodes wont be added to this. Still, hopefully good enough
count, ok := e.cache.Get(v.ShortURL)
if ok {
v.HitCount += count.(int64)
for _, rec := range records {
uri := new(url.URLPair)
if err := rec.Decode(uri); err != nil {
continue
}
v.ShortURL = e.hostPrefix + v.ShortURL
rsp.Urls = append(rsp.Urls, uri)
}
return nil
}
func (e *Url) Proxy(ctx context.Context, req *url.ProxyRequest, rsp *url.ProxyResponse) error {
var pair url.URLPair
id := strings.Replace(req.ShortURL, e.hostPrefix, "", -1)
err := e.pairs.Read(model.QueryEquals("shortURL", id), &pair)
records, err := store.Read("url/" + id)
if err != nil {
return err
}
v, found := e.cache.Get(id)
// @todo there is an ABA problem with this solution
// when it comes to the hit counter
if !found {
e.cache.Set(id, int64(1), cache.NoExpiration)
} else {
// we null out the counter
e.cache.Set(id, int64(0), cache.NoExpiration)
if v.(int64)%10 == 0 {
go func() {
// We add instead of set in case the service runs in multiple
// instances
pair.HitCount += v.(int64) + int64(1)
err = e.pairs.Update(pair)
if err != nil {
logger.Error(err)
}
}()
}
if len(records) == 0 {
return errors.NotFound("url.proxy", "not found")
}
rsp.DestinationURL = pair.DestinationURL
uri := new(url.URLPair)
if err := records[0].Decode(uri); err != nil {
return err
}
rsp.DestinationURL = uri.DestinationURL
return nil
}

115
url/proto/url.pb.go
View File

@@ -1,7 +1,7 @@
// Code generated by protoc-gen-go. DO NOT EDIT.
// versions:
// protoc-gen-go v1.26.0
// protoc v3.6.1
// protoc-gen-go v1.27.1
// protoc v3.15.6
// source: proto/url.proto
package url
@@ -20,12 +20,13 @@ const (
_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
)
// Shortens a destination URL and returns a full short URL.
// Shorten a long URL
type ShortenRequest struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
// the url to shorten
DestinationURL string `protobuf:"bytes,1,opt,name=destinationURL,proto3" json:"destinationURL,omitempty"`
}
@@ -73,6 +74,7 @@ type ShortenResponse struct {
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
// the shortened url
ShortURL string `protobuf:"bytes,1,opt,name=shortURL,proto3" json:"shortURL,omitempty"`
}
@@ -120,11 +122,12 @@ type URLPair struct {
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
// destination url
DestinationURL string `protobuf:"bytes,1,opt,name=destinationURL,proto3" json:"destinationURL,omitempty"`
ShortURL string `protobuf:"bytes,2,opt,name=shortURL,proto3" json:"shortURL,omitempty"`
Owner string `protobuf:"bytes,3,opt,name=owner,proto3" json:"owner,omitempty"`
Created int64 `protobuf:"varint,4,opt,name=created,proto3" json:"created,omitempty"`
HitCount int64 `protobuf:"varint,5,opt,name=hitCount,proto3" json:"hitCount,omitempty"`
// shortened url
ShortURL string `protobuf:"bytes,2,opt,name=shortURL,proto3" json:"shortURL,omitempty"`
// time of creation
Created string `protobuf:"bytes,4,opt,name=created,proto3" json:"created,omitempty"`
}
func (x *URLPair) Reset() {
@@ -173,29 +176,14 @@ func (x *URLPair) GetShortURL() string {
return ""
}
func (x *URLPair) GetOwner() string {
func (x *URLPair) GetCreated() string {
if x != nil {
return x.Owner
return x.Created
}
return ""
}
func (x *URLPair) GetCreated() int64 {
if x != nil {
return x.Created
}
return 0
}
func (x *URLPair) GetHitCount() int64 {
if x != nil {
return x.HitCount
}
return 0
}
// List shortened URLs. It has no input parameters, as it will take
// the user ID from the token and list the user's (caller's) shortened URLs.
// List all the shortened URLs
type ListRequest struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
@@ -249,7 +237,7 @@ type ListResponse struct {
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
UrlPairs []*URLPair `protobuf:"bytes,1,rep,name=urlPairs,proto3" json:"urlPairs,omitempty"`
Urls []*URLPair `protobuf:"bytes,1,rep,name=urls,proto3" json:"urls,omitempty"`
}
func (x *ListResponse) Reset() {
@@ -284,16 +272,14 @@ func (*ListResponse) Descriptor() ([]byte, []int) {
return file_proto_url_proto_rawDescGZIP(), []int{4}
}
func (x *ListResponse) GetUrlPairs() []*URLPair {
func (x *ListResponse) GetUrls() []*URLPair {
if x != nil {
return x.UrlPairs
return x.Urls
}
return nil
}
// Proxy returns the destination URL of a short URL.
// Proxy resolves even URLs not owned by the token holder,
// unlike the List endpoint.
type ProxyRequest struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
@@ -401,42 +387,37 @@ var file_proto_url_proto_rawDesc = []byte{
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}
var (
@@ -462,7 +443,7 @@ var file_proto_url_proto_goTypes = []interface{}{
(*ProxyResponse)(nil), // 6: url.ProxyResponse
}
var file_proto_url_proto_depIdxs = []int32{
2, // 0: url.ListResponse.urlPairs:type_name -> url.URLPair
2, // 0: url.ListResponse.urls:type_name -> url.URLPair
0, // 1: url.Url.Shorten:input_type -> url.ShortenRequest
3, // 2: url.Url.List:input_type -> url.ListRequest
5, // 3: url.Url.Proxy:input_type -> url.ProxyRequest

20
url/proto/url.proto
View File

@@ -2,7 +2,7 @@ syntax = "proto3";
package url;
option go_package = "github.com/micro/services/url/proto;url";
option go_package = "./proto;url";
service Url {
rpc Shorten(ShortenRequest) returns (ShortenResponse) {}
@@ -10,34 +10,34 @@ service Url {
rpc Proxy(ProxyRequest) returns (ProxyResponse) {}
}
// Shortens a destination URL and returns a full short URL.
// Shorten a long URL
message ShortenRequest {
// the url to shorten
string destinationURL = 1;
}
message ShortenResponse {
// the shortened url
string shortURL = 1;
}
message URLPair {
// destination url
string destinationURL = 1;
// shortened url
string shortURL = 2;
string owner = 3;
int64 created = 4;
// HitCount keeps track many times the short URL has been resolved.
// Hitcount only gets saved to disk (database) after every 10th hit, so
// its not intended to be 100% accurate, more like an almost correct estimate.
int64 hitCount = 5;
// time of creation
string created = 4;
}
// List information on all the shortened URLs that you have created
// List all the shortened URLs
message ListRequest {
// filter by short URL, optional
string shortURL = 2;
}
message ListResponse {
repeated URLPair urlPairs = 1;
repeated URLPair urls = 1;
}
// Proxy returns the destination URL of a short URL.