github.com/wfusion/gofusion@v1.1.14/common/infra/asynq/asynqmon/redis_info_handlers.go (about)

     1  package asynqmon
     2  
     3  import (
     4  	"context"
     5  	"net/http"
     6  	"strings"
     7  
     8  	"github.com/redis/go-redis/v9"
     9  
    10  	"github.com/wfusion/gofusion/common/infra/asynq"
    11  	"github.com/wfusion/gofusion/common/utils/serialize/json"
    12  )
    13  
    14  // ****************************************************************************
    15  // This file defines:
    16  //   - http.Handler(s) for redis info related endpoints
    17  // ****************************************************************************
    18  
    19  type redisInfoResponse struct {
    20  	Addr    string            `json:"address"`
    21  	Info    map[string]string `json:"info"`
    22  	RawInfo string            `json:"raw_info"`
    23  	Cluster bool              `json:"cluster"`
    24  
    25  	// Following fields are only set when connected to redis cluster.
    26  	RawClusterNodes string               `json:"raw_cluster_nodes"`
    27  	QueueLocations  []*queueLocationInfo `json:"queue_locations"`
    28  }
    29  
    30  type queueLocationInfo struct {
    31  	Queue   string   `json:"queue"`   // queue name
    32  	KeySlot int64    `json:"keyslot"` // cluster key slot for the queue
    33  	Nodes   []string `json:"nodes"`   // list of cluster node addresses
    34  }
    35  
    36  func newRedisInfoHandlerFunc(client *redis.Client) http.HandlerFunc {
    37  	return func(w http.ResponseWriter, r *http.Request) {
    38  		res, err := client.Info(context.Background()).Result()
    39  		if err != nil {
    40  			http.Error(w, err.Error(), http.StatusInternalServerError)
    41  			return
    42  		}
    43  		info := parseRedisInfo(res)
    44  		resp := redisInfoResponse{
    45  			Addr:    client.Options().Addr,
    46  			Info:    info,
    47  			RawInfo: res,
    48  			Cluster: false,
    49  		}
    50  		if err := json.NewEncoder(w).Encode(resp); err != nil {
    51  			http.Error(w, err.Error(), http.StatusInternalServerError)
    52  			return
    53  		}
    54  	}
    55  }
    56  
    57  func newRedisClusterInfoHandlerFunc(client *redis.ClusterClient, inspector *asynq.Inspector) http.HandlerFunc {
    58  	return func(w http.ResponseWriter, r *http.Request) {
    59  		ctx := context.Background()
    60  		rawClusterInfo, err := client.ClusterInfo(ctx).Result()
    61  		if err != nil {
    62  			http.Error(w, err.Error(), http.StatusInternalServerError)
    63  			return
    64  		}
    65  		info := parseRedisInfo(rawClusterInfo)
    66  		rawClusterNodes, err := client.ClusterNodes(ctx).Result()
    67  		if err != nil {
    68  			http.Error(w, err.Error(), http.StatusInternalServerError)
    69  			return
    70  		}
    71  		queues, err := inspector.Queues()
    72  		if err != nil {
    73  			http.Error(w, err.Error(), http.StatusInternalServerError)
    74  			return
    75  		}
    76  		var queueLocations []*queueLocationInfo
    77  		for _, qname := range queues {
    78  			q := queueLocationInfo{Queue: qname}
    79  			q.KeySlot, err = inspector.ClusterKeySlot(qname)
    80  			if err != nil {
    81  				http.Error(w, err.Error(), http.StatusInternalServerError)
    82  				return
    83  			}
    84  			nodes, err := inspector.ClusterNodes(qname)
    85  			if err != nil {
    86  				http.Error(w, err.Error(), http.StatusInternalServerError)
    87  				return
    88  			}
    89  			for _, n := range nodes {
    90  				q.Nodes = append(q.Nodes, n.Addr)
    91  			}
    92  			queueLocations = append(queueLocations, &q)
    93  		}
    94  
    95  		resp := redisInfoResponse{
    96  			Addr:            strings.Join(client.Options().Addrs, ","),
    97  			Info:            info,
    98  			RawInfo:         rawClusterInfo,
    99  			Cluster:         true,
   100  			RawClusterNodes: rawClusterNodes,
   101  			QueueLocations:  queueLocations,
   102  		}
   103  		if err := json.NewEncoder(w).Encode(resp); err != nil {
   104  			http.Error(w, err.Error(), http.StatusInternalServerError)
   105  			return
   106  		}
   107  	}
   108  }
   109  
   110  // Parses the return value from the INFO command.
   111  // See https://redis.io/commands/info#return-value.
   112  func parseRedisInfo(infoStr string) map[string]string {
   113  	info := make(map[string]string)
   114  	lines := strings.Split(infoStr, "\r\n")
   115  	for _, l := range lines {
   116  		kv := strings.Split(l, ":")
   117  		if len(kv) == 2 {
   118  			info[kv[0]] = kv[1]
   119  		}
   120  	}
   121  	return info
   122  
   123  }