Obtains logs based on the cursor and quantity. You must specify a shard when the system obtains logs. In scenarios such as Storm, elective and collaborative consumption can be performed by using LoghubClientLib . Currently, only log group list in Protocol Buffer (PB) format can be read.

Request syntax

GET /logstores/ay42/shards/0? type=logs&cursor=MTQ0NzMyOTQwMTEwMjEzMDkwNA==&count=100 HTTP/1.1
Accept: application/x-protobuf
Accept-Encoding: lz4
Authorization: <AuthorizationString>
Date: <GMT Date>
Host: <Project Endpoint>
x-log-apiversion: 0.6.0
x-log-signaturemethod: hmac-sha1

Request parameters

URL parameters:
Parameter Type Required Description
type  string Yes The logs.
cursor string Yes A cursor used to indicate where to start reading data, which is equivalent to the start point.
count int Yes The number of returned log groups, ranging from 1 to 1000.
Request header
  • Accept: application/x-protobuf
  • Accept-Encoding: lz4, deflate, or “”

For more information about the public request headers of Log Service APIs, see Public request header.

Response header
  • x-log-cursor: The next cursor of the currently read data.
  • x-log-count: The number of currently returned logs.
For more information about the public response headers of Log Service APIs, see Public response header.
Response element

Serialized data (which may be compressed) in PB format.

Error code

Besides the  common error codes of Log Service APIs,  the UpdateLogstore API may return the following special error codes.

HTTP status code ErrorCode ErrorMessage
404 LogStoreNotExist Logstore {Name} does not exist
400 Parameterinvalid Parameter Cursor is not valid
400 ParameterInvalid ParameterCount should be in [0-1000]
400 ShardNotExist Shard {ShardID} does not exist
400 InvalidCursor This cursor is invalid
500 InternalServerError Specified Server Error Message

Example

Request example 
Read data from shard 0.
GET /logstores/sls-test-logstore/shards/0? cursor=MTQ0NzMyOTQwMTEwMjEzMDkwNA==&count=1000&type=log  
Header:
{
    "Authorization"="LOG <yourAccessKeyId>:<yourSignature>", 
    "x-log-bodyrawsize"=0, 
    "User-Agent" : "sls-java-sdk-v-0.6.0", 
    "x-log-apiversion" : "0.6.0", 
    "Host" : "ali-test-project.cn-hangzhou-failover-intranet.sls.aliyuncs.com", 
    "x-log-signaturemethod" : "hmac-sha1", 
    "Accept-Encoding" : "lz4", 
    "Content-Length": 0,
    "Date" : "Thu, 12 Nov 2015 12:03:17 GMT",
    "Content-Type" : "application/x-protobuf", 
    "accept" : "application/x-protobuf"
}
Response example 
Header:
{
    "x-log-count" : "1000", 
    "x-log-requestid" : "56447FB20351626D7C000874", 
    "Server" : "nginx/1.6.1", 
    "x-log-bodyrawsize" : "34121", 
    "Connection" : "close", 
    "Content-Length" : "4231", 
    "x-log-cursor" : "MTQ0NzMyOTQwMTEwMjEzMDkwNA==", 
    "Date" : "Thu, 12 Nov 2015 12:01:54 GMT", 
    "x-log-compresstype" : "lz4", 
    "Content-Type" : "application/x-protobuf"
}
Body:
The <log group list in PB format> after the compression.
Page flip

To flip the page (get the next  token) without returning data, the system can send HTTP HEAD requests.