func (this *Client) Sub(opt SubOption, h SubHandler) error {
var u url.URL
u.Scheme = this.cf.Sub.Scheme
u.Host = this.cf.Sub.Endpoint
u.Path = fmt.Sprintf("/v1/msgs/%s/%s/%s", opt.AppId, opt.Topic, opt.Ver)
q := u.Query()
q.Set("group", opt.Group)
if opt.Shadow != "" && sla.ValidateShadowName(opt.Shadow) {
q.Set("use", opt.Shadow)
}
if opt.Reset != "" {
q.Set("reset", opt.Reset)
}
if opt.Batch > 1 {
q.Set("batch", strconv.Itoa(opt.Batch))
}
if opt.Wait != "" {
q.Set("wait", opt.Wait)
}
u.RawQuery = q.Encode()
req, err := http.NewRequest("GET", u.String(), nil)
if err != nil {
return err
}
req.Header.Set(gateway.HttpHeaderAppid, this.cf.AppId)
req.Header.Set(gateway.HttpHeaderSubkey, this.cf.Secret)
for {
response, err := this.subConn.Do(req)
if err != nil {
return err
}
b, err := ioutil.ReadAll(response.Body)
if err != nil {
return err
}
if this.cf.Debug {
log.Printf("--> [%s]", response.Status)
log.Printf("Partition:%s Offset:%s",
response.Header.Get("X-Partition"),
response.Header.Get("X-Offset"))
}
// reuse the connection
response.Body.Close()
if err = h(response.StatusCode, b); err != nil {
return err
}
}
}
// SubX is advanced Sub with features of delayed ack and shadow bury.
func (this *Client) SubX(opt SubOption, h SubXHandler) error {
var u url.URL
u.Scheme = this.cf.Sub.Scheme
u.Host = this.cf.Sub.Endpoint
u.Path = fmt.Sprintf("/v1/msgs/%s/%s/%s", opt.AppId, opt.Topic, opt.Ver)
q := u.Query()
q.Set("group", opt.Group)
q.Set("ack", "1")
if opt.Shadow != "" && sla.ValidateShadowName(opt.Shadow) {
q.Set("q", opt.Shadow)
}
if opt.Reset != "" {
q.Set("reset", opt.Reset)
}
if opt.Batch > 1 {
q.Set("batch", strconv.Itoa(opt.Batch))
}
if opt.Wait != "" {
q.Set("wait", opt.Wait)
}
u.RawQuery = q.Encode()
req := gorequest.New()
req.Get(u.String()).
Set(gateway.HttpHeaderAppid, this.cf.AppId).
Set(gateway.HttpHeaderSubkey, this.cf.Secret).
Set("User-Agent", UserAgent).
Set(gateway.HttpHeaderPartition, "-1").
Set(gateway.HttpHeaderOffset, "-1")
r := &SubXResult{}
for {
response, b, errs := req.EndBytes()
if len(errs) > 0 {
return errs[0]
}
// reset the request header
req.Set(gateway.HttpHeaderPartition, "")
req.Set(gateway.HttpHeaderOffset, "")
req.Set(gateway.HttpHeaderMsgBury, "")
if this.cf.Debug {
log.Printf("--> [%s]", response.Status)
log.Printf("Partition:%s Offset:%s",
response.Header.Get(gateway.HttpHeaderPartition),
response.Header.Get(gateway.HttpHeaderOffset))
}
r.Reset()
r.Partition = response.Header.Get(gateway.HttpHeaderPartition)
r.Offset = response.Header.Get(gateway.HttpHeaderOffset)
r.Tag = response.Header.Get(gateway.HttpHeaderMsgTag)
if err := h(response.StatusCode, b, r); err != nil {
return err
}
req.Set(gateway.HttpHeaderPartition, r.Partition)
req.Set(gateway.HttpHeaderOffset, r.Offset)
if r.Bury != "" {
if r.Bury != ShadowRetry && r.Bury != ShadowDead {
return ErrInvalidBury
}
req.Set("X-Bury", r.Bury)
}
}
}
// GET /v1/msgs/:appid/:topic/:ver?group=xx&batch=10&reset=<newest|oldest>&ack=1&q=<dead|retry>
func (this *subServer) subHandler(w http.ResponseWriter, r *http.Request, params httprouter.Params) {
var (
topic string
ver string
myAppid string
hisAppid string
reset string
group string
shadow string
rawTopic string
partition string
partitionN int = -1
offset string
offsetN int64 = -1
limit int // max messages to include in the message set
delayedAck bool // explicit application level acknowledgement
tagFilters []MsgTag = nil
err error
)
if Options.EnableClientStats {
this.gw.clientStates.RegisterSubClient(r)
}
query := r.URL.Query()
group = query.Get("group")
reset = query.Get("reset")
if !manager.Default.ValidateGroupName(r.Header, group) {
writeBadRequest(w, "illegal group")
return
}
limit, err = getHttpQueryInt(&query, "batch", 1)
if err != nil {
writeBadRequest(w, "illegal limit")
return
}
if limit > Options.MaxSubBatchSize && Options.MaxSubBatchSize > 0 {
limit = Options.MaxSubBatchSize
}
ver = params.ByName(UrlParamVersion)
topic = params.ByName(UrlParamTopic)
hisAppid = params.ByName(UrlParamAppid)
myAppid = r.Header.Get(HttpHeaderAppid)
realIp := getHttpRemoteIp(r)
// auth
if err = manager.Default.AuthSub(myAppid, r.Header.Get(HttpHeaderSubkey),
hisAppid, topic, group); err != nil {
log.Error("sub[%s] -(%s): {app:%s topic:%s ver:%s group:%s UA:%s} %v",
myAppid, realIp, hisAppid, topic, ver,
group, r.Header.Get("User-Agent"), err)
writeAuthFailure(w, err)
return
}
// fetch the client ack partition and offset
delayedAck = query.Get("ack") == "1"
if delayedAck {
// consumers use explicit acknowledges in order to signal a message as processed successfully
// if consumers fail to ACK, the message hangs and server will refuse to move ahead
// get the partitionN and offsetN from client header
// client will ack with partition=-1, offset=-1:
// 1. handshake phase
// 2. when 204 No Content
partition = r.Header.Get(HttpHeaderPartition)
offset = r.Header.Get(HttpHeaderOffset)
if partition != "" && offset != "" {
// convert partition and offset to int
offsetN, err = strconv.ParseInt(offset, 10, 64)
if err != nil {
log.Error("sub[%s] %s(%s): {app:%s topic:%s ver:%s group:%s UA:%s} offset:%s",
myAppid, r.RemoteAddr, realIp, hisAppid, topic, ver,
group, r.Header.Get("User-Agent"), offset)
writeBadRequest(w, "ack with bad offset")
return
}
partitionN, err = strconv.Atoi(partition)
if err != nil {
log.Error("sub[%s] %s(%s): {app:%s topic:%s ver:%s group:%s UA:%s} partition:%s",
myAppid, r.RemoteAddr, realIp, hisAppid, topic, ver,
group, r.Header.Get("User-Agent"), partition)
writeBadRequest(w, "ack with bad partition")
return
}
} else if len(partition+offset) != 0 {
log.Error("sub[%s] %s(%s): {app:%s topic:%s ver:%s group:%s partition:%s offset:%s UA:%s} partial ack",
myAppid, r.RemoteAddr, realIp, hisAppid, topic, ver,
group, partition, offset, r.Header.Get("User-Agent"))
writeBadRequest(w, "partial ack not allowed")
return
}
}
shadow = query.Get("q")
if Options.AuditSub {
this.auditor.Trace("sub[%s] %s(%s): {app:%s q:%s topic:%s ver:%s group:%s batch:%d ack:%s partition:%s offset:%s UA:%s}",
myAppid, r.RemoteAddr, realIp, hisAppid, shadow, topic, ver,
group, limit, query.Get("ack"), partition, offset, r.Header.Get("User-Agent"))
}
// calculate raw topic according to shadow
if shadow != "" {
if !sla.ValidateShadowName(shadow) {
log.Error("sub[%s] %s(%s): {app:%s topic:%s ver:%s group:%s q:%s UA:%s} invalid shadow name",
myAppid, r.RemoteAddr, realIp, hisAppid, topic, ver,
group, shadow, r.Header.Get("User-Agent"))
writeBadRequest(w, "invalid shadow name")
return
}
if !manager.Default.IsShadowedTopic(hisAppid, topic, ver, myAppid, group) {
log.Error("sub[%s] %s(%s): {app:%s topic:%s ver:%s group:%s q:%s UA:%s} not a shadowed topic",
myAppid, r.RemoteAddr, realIp, hisAppid, topic, ver,
group, shadow, r.Header.Get("User-Agent"))
writeBadRequest(w, "register shadow first")
return
}
rawTopic = manager.Default.ShadowTopic(shadow, myAppid, hisAppid, topic, ver, group)
} else {
rawTopic = manager.Default.KafkaTopic(hisAppid, topic, ver)
}
cluster, found := manager.Default.LookupCluster(hisAppid)
if !found {
log.Error("sub[%s] %s(%s): {app:%s topic:%s ver:%s group:%s UA:%s} cluster not found",
myAppid, r.RemoteAddr, realIp, hisAppid, topic, ver,
group, r.Header.Get("User-Agent"))
writeBadRequest(w, "invalid appid")
return
}
fetcher, err := store.DefaultSubStore.Fetch(cluster, rawTopic,
myAppid+"."+group, r.RemoteAddr, reset, Options.PermitStandbySub)
if err != nil {
log.Error("sub[%s] -(%s): {app:%s topic:%s ver:%s group:%s UA:%s} %v",
myAppid, realIp, hisAppid, topic, ver,
group, r.Header.Get("User-Agent"), err)
if store.DefaultSubStore.IsSystemError(err) {
writeServerError(w, err.Error())
} else {
writeBadRequest(w, err.Error())
}
return
}
// commit the acked offset
if delayedAck && partitionN >= 0 && offsetN >= 0 {
if err = fetcher.CommitUpto(&sarama.ConsumerMessage{
Topic: rawTopic,
Partition: int32(partitionN),
Offset: offsetN,
}); err != nil {
// during rebalance, this might happen, but with no bad effects
log.Trace("sub land[%s] %s(%s): {app:%s topic:%s/%s ver:%s group:%s ack:1 offset:%s UA:%s} %v",
myAppid, r.RemoteAddr, realIp, hisAppid, topic, partition, ver,
group, offset, r.Header.Get("User-Agent"), err)
} else {
log.Debug("sub land %s(%s): {G:%s, T:%s/%s, O:%s}",
r.RemoteAddr, realIp, group, rawTopic, partition, offset)
}
}
tag := r.Header.Get(HttpHeaderMsgTag)
if tag != "" {
tagFilters = parseMessageTag(tag)
}
err = this.pumpMessages(w, r, fetcher, limit, myAppid, hisAppid, topic, ver, group, delayedAck, tagFilters)
if err != nil {
// e,g. broken pipe, io timeout, client gone
log.Error("sub[%s] %s(%s): {app:%s topic:%s ver:%s group:%s ack:%s partition:%s offset:%s UA:%s} %v",
myAppid, r.RemoteAddr, realIp, hisAppid, topic, ver,
group, query.Get("ack"), partition, offset, r.Header.Get("User-Agent"), err)
writeServerError(w, err.Error())
if err = fetcher.Close(); err != nil {
log.Error("sub[%s] %s(%s): {app:%s topic:%s ver:%s group:%s} %v",
myAppid, r.RemoteAddr, realIp, hisAppid, topic, ver, group, err)
}
}
}
// PUT /v1/bury/:appid/:topic/:ver?group=xx&q=yy
func (this *subServer) buryHandler(w http.ResponseWriter, r *http.Request, params httprouter.Params) {
var (
topic string
ver string
myAppid string
hisAppid string
group string
rawTopic string
shadow string
bury string
partition string
partitionN int = -1
offset string
offsetN int64 = -1
err error
)
query := r.URL.Query()
group = query.Get("group")
if !manager.Default.ValidateGroupName(r.Header, group) {
writeBadRequest(w, "illegal group")
return
}
ver = params.ByName(UrlParamVersion)
topic = params.ByName(UrlParamTopic)
hisAppid = params.ByName(UrlParamAppid)
myAppid = r.Header.Get(HttpHeaderAppid)
bury = r.Header.Get(HttpHeaderMsgBury)
if !sla.ValidateShadowName(bury) {
log.Error("bury[%s] %s(%s): {app:%s topic:%s ver:%s group:%s UA:%s} illegal bury: %s",
myAppid, r.RemoteAddr, getHttpRemoteIp(r), hisAppid, topic, ver,
group, r.Header.Get("User-Agent"), bury)
writeBadRequest(w, "illegal bury")
return
}
// auth
if err = manager.Default.AuthSub(myAppid, r.Header.Get(HttpHeaderSubkey),
hisAppid, topic, group); err != nil {
log.Error("bury[%s] %s(%s): {app:%s topic:%s ver:%s group:%s UA:%s} %v",
myAppid, r.RemoteAddr, getHttpRemoteIp(r), hisAppid, topic, ver,
group, r.Header.Get("User-Agent"), err)
writeAuthFailure(w, err)
return
}
partition = r.Header.Get(HttpHeaderPartition)
offset = r.Header.Get(HttpHeaderOffset)
if partition == "" || offset == "" {
log.Error("bury[%s] %s(%s): {app:%s topic:%s ver:%s group:%s UA:%s} empty offset or partition",
myAppid, r.RemoteAddr, getHttpRemoteIp(r), hisAppid, topic, ver,
group, r.Header.Get("User-Agent"))
writeBadRequest(w, "empty offset or partition")
return
}
offsetN, err = strconv.ParseInt(offset, 10, 64)
if err != nil || offsetN < 0 {
log.Error("bury[%s] %s(%s): {app:%s topic:%s ver:%s group:%s UA:%s} illegal offset:%s",
myAppid, r.RemoteAddr, getHttpRemoteIp(r), hisAppid, topic, ver,
group, r.Header.Get("User-Agent"), offset)
writeBadRequest(w, "bad offset")
return
}
partitionN, err = strconv.Atoi(partition)
if err != nil || partitionN < 0 {
log.Error("bury[%s] %s(%s): {app:%s topic:%s ver:%s group:%s UA:%s} illegal partition:%s",
myAppid, r.RemoteAddr, getHttpRemoteIp(r), hisAppid, topic, ver,
group, r.Header.Get("User-Agent"), partition)
writeBadRequest(w, "bad partition")
return
}
shadow = query.Get("q")
log.Debug("bury[%s] %s(%s): {app:%s bury:%s shadow=%s topic:%s ver:%s group:%s partition:%s offset:%s UA:%s}",
myAppid, r.RemoteAddr, getHttpRemoteIp(r), hisAppid, bury, shadow, topic, ver,
partition, offset, r.Header.Get("User-Agent"))
msgLen := int(r.ContentLength)
msg := make([]byte, 0, msgLen)
if _, err := io.ReadAtLeast(r.Body, msg, msgLen); err != nil {
log.Error("bury[%s] %s(%s): {app:%s topic:%s ver:%s group:%s UA:%s} %v",
myAppid, r.RemoteAddr, getHttpRemoteIp(r), hisAppid, topic, ver,
group, r.Header.Get("User-Agent"), err)
writeBadRequest(w, err.Error())
return
}
cluster, found := manager.Default.LookupCluster(hisAppid)
if !found {
log.Error("bury[%s] %s(%s): {app:%s topic:%s ver:%s group:%s UA:%s} invalid appid:%s",
myAppid, r.RemoteAddr, getHttpRemoteIp(r), hisAppid, topic, ver,
group, r.Header.Get("User-Agent"), hisAppid)
writeBadRequest(w, "invalid appid")
return
}
// calculate raw topic according to shadow
if shadow != "" {
if !sla.ValidateShadowName(shadow) {
log.Error("bury[%s] %s(%s): {app:%s topic:%s ver:%s group:%s q:%s UA:%s} invalid shadow name",
myAppid, r.RemoteAddr, getHttpRemoteIp(r), hisAppid, topic, ver,
group, shadow, r.Header.Get("User-Agent"))
writeBadRequest(w, "invalid shadow name")
return
}
if !manager.Default.IsShadowedTopic(hisAppid, topic, ver, myAppid, group) {
log.Error("bury[%s] %s(%s): {app:%s topic:%s ver:%s group:%s q:%s UA:%s} not a shadowed topic",
myAppid, r.RemoteAddr, getHttpRemoteIp(r), hisAppid, topic, ver,
group, shadow, r.Header.Get("User-Agent"))
writeBadRequest(w, "register shadow first")
return
}
rawTopic = manager.Default.ShadowTopic(shadow, myAppid, hisAppid, topic, ver, group)
} else {
rawTopic = manager.Default.KafkaTopic(hisAppid, topic, ver)
}
fetcher, err := store.DefaultSubStore.Fetch(cluster, rawTopic,
myAppid+"."+group, r.RemoteAddr, "", Options.PermitStandbySub)
if err != nil {
log.Error("bury[%s] %s(%s): {app:%s topic:%s ver:%s group:%s UA:%s} %v",
myAppid, r.RemoteAddr, getHttpRemoteIp(r), hisAppid, topic, ver,
group, r.Header.Get("User-Agent"), err)
writeBadRequest(w, err.Error())
return
}
// step1: pub
shadowTopic := manager.Default.ShadowTopic(bury, myAppid, hisAppid, topic, ver, group)
_, _, err = store.DefaultPubStore.SyncPub(cluster, shadowTopic, nil, msg)
if err != nil {
log.Error("bury[%s] %s(%s): {app:%s topic:%s ver:%s group:%s} %v",
myAppid, r.RemoteAddr, getHttpRemoteIp(r), hisAppid, topic, ver, group, err)
writeServerError(w, err.Error())
return
}
// step2: skip this message in the master topic TODO atomic with step1
if err = fetcher.CommitUpto(&sarama.ConsumerMessage{
Topic: rawTopic, // FIXME it's wrong!!!
Partition: int32(partitionN),
Offset: offsetN,
}); err != nil {
log.Error("bury[%s] %s(%s): {app:%s topic:%s ver:%s group:%s} %v",
myAppid, r.RemoteAddr, getHttpRemoteIp(r), hisAppid, topic, ver, group, err)
writeServerError(w, err.Error())
return
}
w.Write(ResponseOk)
}
//go:generate goannotation $GOFILE
// @rest GET /v1/msgs/:appid/:topic/:ver?group=xx&batch=10&reset=<newest|oldest>&ack=1&q=<dead|retry>
func (this *subServer) subHandler(w http.ResponseWriter, r *http.Request, params httprouter.Params) {
var (
topic string
ver string
myAppid string
hisAppid string
reset string
group string
realGroup string
shadow string
rawTopic string
partition string
partitionN int = -1
offset string
offsetN int64 = -1
limit int // max messages to include in the message set
delayedAck bool // last acked partition/offset piggybacked on this request
err error
)
if !Options.DisableMetrics {
this.subMetrics.SubTryQps.Mark(1)
}
query := r.URL.Query()
group = query.Get("group")
myAppid = r.Header.Get(HttpHeaderAppid)
realGroup = myAppid + "." + group
reset = query.Get("reset")
realIp := getHttpRemoteIp(r)
if !manager.Default.ValidateGroupName(r.Header, group) {
log.Error("sub -(%s): illegal group: %s", realIp, group)
this.subMetrics.ClientError.Mark(1)
writeBadRequest(w, "illegal group")
return
}
if Options.BadGroupRateLimit && !this.throttleBadGroup.Pour(realGroup, 0) {
this.goodGroupLock.RLock()
_, good := this.goodGroupClients[r.RemoteAddr]
this.goodGroupLock.RUnlock()
if !good {
// this bad group client is in confinement period
log.Error("sub -(%s): group[%s] failure quota exceeded %s", realIp, realGroup, r.Header.Get("User-Agent"))
writeQuotaExceeded(w)
return
}
}
limit, err = getHttpQueryInt(&query, "batch", 1)
if err != nil {
log.Error("sub -(%s): illegal batch: %v", realIp, err)
this.subMetrics.ClientError.Mark(1)
writeBadRequest(w, "illegal batch")
return
}
if limit > Options.MaxSubBatchSize && Options.MaxSubBatchSize > 0 {
limit = Options.MaxSubBatchSize
}
ver = params.ByName(UrlParamVersion)
topic = params.ByName(UrlParamTopic)
hisAppid = params.ByName(UrlParamAppid)
// auth
if err = manager.Default.AuthSub(myAppid, r.Header.Get(HttpHeaderSubkey),
hisAppid, topic, group); err != nil {
log.Error("sub[%s/%s] -(%s): {%s.%s.%s UA:%s} %v",
myAppid, group, realIp, hisAppid, topic, ver, r.Header.Get("User-Agent"), err)
this.subMetrics.ClientError.Mark(1)
writeAuthFailure(w, err)
return
}
// fetch the client ack partition and offset
delayedAck = query.Get("ack") == "1"
if delayedAck {
// consumers use explicit acknowledges in order to signal a message as processed successfully
// if consumers fail to ACK, the message hangs and server will refuse to move ahead
// get the partitionN and offsetN from client header
// client will ack with partition=-1, offset=-1:
// 1. handshake phase
// 2. when 204 No Content
partition = r.Header.Get(HttpHeaderPartition)
offset = r.Header.Get(HttpHeaderOffset)
if partition != "" && offset != "" {
// convert partition and offset to int
offsetN, err = strconv.ParseInt(offset, 10, 64)
if err != nil {
log.Error("sub[%s/%s] %s(%s) {%s.%s.%s UA:%s} offset:%s",
myAppid, group, r.RemoteAddr, realIp, hisAppid, topic, ver, r.Header.Get("User-Agent"), offset)
this.subMetrics.ClientError.Mark(1)
writeBadRequest(w, "ack with bad offset")
return
}
partitionN, err = strconv.Atoi(partition)
if err != nil {
log.Error("sub[%s/%s] %s(%s) {%s.%s.%s UA:%s} partition:%s",
myAppid, group, r.RemoteAddr, realIp, hisAppid, topic, ver, r.Header.Get("User-Agent"), partition)
this.subMetrics.ClientError.Mark(1)
writeBadRequest(w, "ack with bad partition")
return
}
} else if len(partition+offset) != 0 {
log.Error("sub[%s/%s] %s(%s) {%s.%s.%s P:%s O:%s UA:%s} partial ack",
myAppid, group, r.RemoteAddr, realIp, hisAppid, topic, ver, partition, offset, r.Header.Get("User-Agent"))
this.subMetrics.ClientError.Mark(1)
writeBadRequest(w, "partial ack not allowed")
return
}
}
shadow = query.Get("q")
log.Debug("sub[%s/%s] %s(%s) {%s.%s.%s q:%s batch:%d ack:%s P:%s O:%s UA:%s}",
myAppid, group, r.RemoteAddr, realIp, hisAppid, topic, ver, shadow,
limit, query.Get("ack"), partition, offset, r.Header.Get("User-Agent"))
if !Options.DisableMetrics {
this.subMetrics.SubQps.Mark(1)
}
// calculate raw topic according to shadow
if shadow != "" {
if !sla.ValidateShadowName(shadow) {
log.Error("sub[%s/%s] %s(%s) {%s.%s.%s q:%s UA:%s} invalid shadow name",
myAppid, group, r.RemoteAddr, realIp, hisAppid, topic, ver, shadow, r.Header.Get("User-Agent"))
this.subMetrics.ClientError.Mark(1)
writeBadRequest(w, "invalid shadow name")
return
}
if !manager.Default.IsShadowedTopic(hisAppid, topic, ver, myAppid, group) {
log.Error("sub[%s/%s] %s(%s) {%s.%s.%s q:%s UA:%s} not a shadowed topic",
myAppid, group, r.RemoteAddr, realIp, hisAppid, topic, ver, shadow, r.Header.Get("User-Agent"))
this.subMetrics.ClientError.Mark(1)
writeBadRequest(w, "register shadow first")
return
}
rawTopic = manager.Default.ShadowTopic(shadow, myAppid, hisAppid, topic, ver, group)
} else {
rawTopic = manager.Default.KafkaTopic(hisAppid, topic, ver)
}
cluster, found := manager.Default.LookupCluster(hisAppid)
if !found {
log.Error("sub[%s/%s] %s(%s) {%s.%s.%s UA:%s} cluster not found",
myAppid, group, r.RemoteAddr, realIp, hisAppid, topic, ver, r.Header.Get("User-Agent"))
this.subMetrics.ClientError.Mark(1)
writeBadRequest(w, "invalid appid")
return
}
fetcher, err := store.DefaultSubStore.Fetch(cluster, rawTopic,
realGroup, r.RemoteAddr, realIp, reset, Options.PermitStandbySub)
if err != nil {
// e,g. kafka was totally shutdown
// e,g. too many consumers for the same group
log.Error("sub[%s/%s] -(%s): {%s.%s.%s UA:%s} %v",
myAppid, group, realIp, hisAppid, topic, ver, r.Header.Get("User-Agent"), err)
if store.DefaultSubStore.IsSystemError(err) {
writeServerError(w, err.Error())
} else {
this.subMetrics.ClientError.Mark(1)
if Options.BadGroupRateLimit && !this.throttleBadGroup.Pour(realGroup, 1) {
writeQuotaExceeded(w)
} else {
writeBadRequest(w, err.Error())
}
}
return
}
// commit the acked offset
if delayedAck && partitionN >= 0 && offsetN >= 0 {
if err = fetcher.CommitUpto(&sarama.ConsumerMessage{
Topic: rawTopic,
Partition: int32(partitionN),
Offset: offsetN,
}); err != nil {
// during rebalance, this might happen, but with no bad effects
log.Trace("sub land[%s/%s] %s(%s) {%s/%s ack:1 O:%s UA:%s} %v",
myAppid, group, r.RemoteAddr, realIp, rawTopic, partition, offset, r.Header.Get("User-Agent"), err)
} else {
log.Debug("sub land[%s/%s] %s(%s) {T:%s/%s, O:%s}",
myAppid, group, r.RemoteAddr, realIp, rawTopic, partition, offset)
}
}
var gz *gzip.Writer
w, gz = gzipWriter(w, r)
err = this.pumpMessages(w, r, realIp, fetcher, limit, myAppid, hisAppid, topic, ver, group, delayedAck)
if err != nil {
// e,g. broken pipe, io timeout, client gone
// e,g. kafka: error while consuming app1.foobar.v1/0: EOF (kafka was shutdown)
log.Error("sub[%s/%s] %s(%s) {%s ack:%s P:%s O:%s UA:%s} %v",
myAppid, group, r.RemoteAddr, realIp, rawTopic, query.Get("ack"), partition, offset, r.Header.Get("User-Agent"), err)
if err != ErrClientGone {
if store.DefaultSubStore.IsSystemError(err) {
writeServerError(w, err.Error())
} else {
this.subMetrics.ClientError.Mark(1)
if Options.BadGroupRateLimit && !this.throttleBadGroup.Pour(realGroup, 1) {
writeQuotaExceeded(w)
} else {
writeBadRequest(w, err.Error())
}
}
} else if Options.BadGroupRateLimit && !store.DefaultSubStore.IsSystemError(err) {
this.throttleBadGroup.Pour(realGroup, 1)
}
// fetch.Close might be called by subServer.closedConnCh
if err = fetcher.Close(); err != nil {
log.Error("sub[%s/%s] %s(%s) %s %v", myAppid, group, r.RemoteAddr, realIp, rawTopic, err)
}
} else if w.Header().Get("Connection") == "close" {
// max req reached, synchronously close this connection
if err = fetcher.Close(); err != nil {
log.Error("sub[%s/%s] %s(%s) %s %v", myAppid, group, r.RemoteAddr, realIp, rawTopic, err)
}
}
if Options.BadGroupRateLimit {
// record the good consumer group client
this.goodGroupLock.Lock()
this.goodGroupClients[r.RemoteAddr] = struct{}{}
this.goodGroupLock.Unlock()
}
if gz != nil {
gz.Close()
}
}
