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Remove cloudflare-go and reimplement workers KV

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This commit is contained in:
Jake Sanders
2019-10-23 17:26:34 +01:00
parent caca93f65b
commit 4f5db08238
2 changed files with 207 additions and 26 deletions
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197
store/cloudflare/cloudflare.go
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@@ -3,20 +3,29 @@
package cloudflare
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"log"
"math"
"net/http"
"net/url"
"strconv"
"time"
"github.com/cloudflare/cloudflare-go"
"github.com/micro/go-micro/config/options"
"github.com/micro/go-micro/store"
"github.com/pkg/errors"
)
var namespaceUUID string
const apiBaseURL = "https://api.cloudflare.com/client/v4/"
type workersKV struct {
options.Options
api *cloudflare.API
httpClient *http.Client
}
// New returns a cloudflare Store implementation.
@@ -30,7 +39,7 @@ func New(opts ...options.Option) (store.Store, error) {
if !ok {
log.Fatal("Store: No CF_API_TOKEN passed as an option")
}
apiTokenString, ok := apiToken.(string)
_, ok = apiToken.(string)
if !ok {
log.Fatal("Store: Option CF_API_TOKEN contains a non-string")
}
@@ -38,7 +47,7 @@ func New(opts ...options.Option) (store.Store, error) {
if !ok {
log.Fatal("Store: No CF_ACCOUNT_ID passed as an option")
}
accountIDString, ok := accountID.(string)
_, ok = accountID.(string)
if !ok {
log.Fatal("Store: Option CF_ACCOUNT_ID contains a non-string")
}
@@ -46,31 +55,45 @@ func New(opts ...options.Option) (store.Store, error) {
if !ok {
log.Fatal("Store: No KV_NAMESPACE_ID passed as an option")
}
namespaceUUID, ok = uuid.(string)
_, ok = uuid.(string)
if !ok {
log.Fatal("Store: Option KV_NAMESPACE_ID contains a non-string")
}
// Create API client
api, err := cloudflare.NewWithAPIToken(apiTokenString, cloudflare.UsingAccount(accountIDString))
if err != nil {
return nil, err
}
return &workersKV{
Options: options,
api: api,
Options: options,
httpClient: &http.Client{},
}, nil
}
// In the cloudflare workers KV implemention, Sync() doesn't guarantee
// anything as the workers API is eventually consistent.
func (w *workersKV) Sync() ([]*store.Record, error) {
response, err := w.api.ListWorkersKVs(context.Background(), namespaceUUID)
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
accountID, _ := w.Options.Values().Get("CF_ACCOUNT_ID")
kvID, _ := w.Options.Values().Get("KV_NAMESPACE_ID")
path := fmt.Sprintf("accounts/%s/storage/kv/namespaces/%s/keys", accountID.(string), kvID.(string))
response, _, _, err := w.request(ctx, http.MethodGet, path, nil, make(http.Header))
if err != nil {
return nil, err
}
a := &APIResponse{}
if err := json.Unmarshal(response, a); err != nil {
return nil, err
}
if !a.Success {
messages := ""
for _, m := range a.Errors {
messages += strconv.Itoa(m.Code) + " " + m.Message + "\n"
}
return nil, errors.New(messages)
}
var keys []string
for _, r := range response.Result {
for _, r := range a.Result {
keys = append(keys, r.Name)
}
return w.Read(keys...)
@@ -80,16 +103,31 @@ func (w *workersKV) Read(keys ...string) ([]*store.Record, error) {
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
accountID, _ := w.Options.Values().Get("CF_ACCOUNT_ID")
kvID, _ := w.Options.Values().Get("KV_NAMESPACE_ID")
var records []*store.Record
for _, k := range keys {
v, err := w.api.ReadWorkersKV(ctx, namespaceUUID, k)
path := fmt.Sprintf("accounts/%s/storage/kv/namespaces/%s/values/%s", accountID.(string), kvID.(string), url.PathEscape(k))
response, headers, status, err := w.request(ctx, http.MethodGet, path, nil, make(http.Header))
if err != nil {
return records, err
}
records = append(records, &store.Record{
if status < 200 || status >= 300 {
return records, errors.New("Received unexpected Status " + strconv.Itoa(status) + string(response))
}
record := &store.Record{
Key: k,
Value: v,
})
Value: response,
}
if expiry := headers.Get("Expiration"); len(expiry) != 0 {
expiryUnix, err := strconv.ParseInt(expiry, 10, 64)
if err != nil {
return records, err
}
record.Expiry = time.Until(time.Unix(expiryUnix, 0))
}
records = append(records, record)
}
return records, nil
}
@@ -98,10 +136,32 @@ func (w *workersKV) Write(records ...*store.Record) error {
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
accountID, _ := w.Options.Values().Get("CF_ACCOUNT_ID")
kvID, _ := w.Options.Values().Get("KV_NAMESPACE_ID")
for _, r := range records {
if _, err := w.api.WriteWorkersKV(ctx, namespaceUUID, r.Key, r.Value); err != nil {
path := fmt.Sprintf("accounts/%s/storage/kv/namespaces/%s/values/%s", accountID.(string), kvID.(string), url.PathEscape(r.Key))
if r.Expiry != 0 {
// Minimum cloudflare TTL is 60 Seconds
exp := int(math.Max(60, math.Round(r.Expiry.Seconds())))
path = path + "?expiration_ttl=" + strconv.Itoa(exp)
}
headers := make(http.Header)
resp, _, _, err := w.request(ctx, http.MethodPut, path, r.Value, headers)
if err != nil {
return err
}
a := &APIResponse{}
if err := json.Unmarshal(resp, a); err != nil {
return err
}
if !a.Success {
messages := ""
for _, m := range a.Errors {
messages += strconv.Itoa(m.Code) + " " + m.Message + "\n"
}
return errors.New(messages)
}
}
return nil
}
@@ -110,10 +170,105 @@ func (w *workersKV) Delete(keys ...string) error {
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
accountID, _ := w.Options.Values().Get("CF_ACCOUNT_ID")
kvID, _ := w.Options.Values().Get("KV_NAMESPACE_ID")
for _, k := range keys {
if _, err := w.api.DeleteWorkersKV(ctx, namespaceUUID, k); err != nil {
path := fmt.Sprintf("accounts/%s/storage/kv/namespaces/%s/values/%s", accountID.(string), kvID.(string), url.PathEscape(k))
resp, _, _, err := w.request(ctx, http.MethodDelete, path, nil, make(http.Header))
if err != nil {
return err
}
a := &APIResponse{}
if err := json.Unmarshal(resp, a); err != nil {
return err
}
if !a.Success {
messages := ""
for _, m := range a.Errors {
messages += strconv.Itoa(m.Code) + " " + m.Message + "\n"
}
return errors.New(messages)
}
}
return nil
}
func (w *workersKV) request(ctx context.Context, method, path string, body interface{}, headers http.Header) ([]byte, http.Header, int, error) {
var jsonBody []byte
var err error
if body != nil {
if paramBytes, ok := body.([]byte); ok {
jsonBody = paramBytes
} else {
jsonBody, err = json.Marshal(body)
if err != nil {
return nil, nil, 0, errors.Wrap(err, "error marshalling params to JSON")
}
}
} else {
jsonBody = nil
}
var reqBody io.Reader
if jsonBody != nil {
reqBody = bytes.NewReader(jsonBody)
}
req, err := http.NewRequestWithContext(ctx, method, apiBaseURL+path, reqBody)
for key, value := range headers {
req.Header[key] = value
}
if token, found := w.Options.Values().Get("CF_API_TOKEN"); found {
req.Header.Set("Authorization", "Bearer "+token.(string))
}
req.Header.Set("User-Agent", "micro/1.0 (https://micro.mu)")
// Official cloudflare client does exponential backoff here
resp, err := w.httpClient.Do(req)
if err != nil {
return nil, nil, 0, err
}
defer resp.Body.Close()
respBody, err := ioutil.ReadAll(resp.Body)
if err != nil {
return respBody, resp.Header, resp.StatusCode, err
}
return respBody, resp.Header, resp.StatusCode, nil
}
// APIResponse is a cloudflare v4 api response
type APIResponse struct {
Result []struct {
ID string `json:"id"`
Type string `json:"type"`
Name string `json:"name"`
Expiration string `json:"expiration"`
Content string `json:"content"`
Proxiable bool `json:"proxiable"`
Proxied bool `json:"proxied"`
TTL int `json:"ttl"`
Priority int `json:"priority"`
Locked bool `json:"locked"`
ZoneID string `json:"zone_id"`
ZoneName string `json:"zone_name"`
ModifiedOn time.Time `json:"modified_on"`
CreatedOn time.Time `json:"created_on"`
} `json:"result"`
Success bool `json:"success"`
Errors []APIMessage `json:"errors"`
// not sure Messages is ever populated?
Messages []APIMessage `json:"messages"`
ResultInfo struct {
Page int `json:"page"`
PerPage int `json:"per_page"`
Count int `json:"count"`
TotalCount int `json:"total_count"`
} `json:"result_info"`
}
// APIMessage is a Cloudflare v4 API Error
type APIMessage struct {
Code int `json:"code"`
Message string `json:"message"`
}