Generating the Download Link of an Object

Function

You can use this command to generate the download link of a specified object in a bucket or generate the download links of objects in a bucket in batches by object name prefix.

Command Line Structure

In Windows

Generating the download link of a single object

obsutil sign obs://bucket/key [-e=300] [-config=xxx] [-endpoint=xxx] [-i=xxx] [-k=xxx] [-t=xxx]

Generating the download links of objects in batches by object name prefix

obsutil sign obs://bucket[/key] -r [-e=300] [-timeRange=time1-time2] [-include=*.xxx] [-exclude=*.xxx] [-o=xxx] [-config=xxx] [-endpoint=xxx] [-i=xxx] [-k=xxx] [-t=xxx]

In Linux or macOS

Generating the download link of a single object

./obsutil sign obs://bucket/key [-e=300] [-config=xxx] [-endpoint=xxx] [-i=xxx] [-k=xxx] [-t=xxx]

Generating the download links of objects in batches by object name prefix

./obsutil sign obs://bucket[/key] -r [-e=300] [-timeRange=time1-time2] [-include=*.xxx] [-exclude=*.xxx] [-o=xxx] [-config=xxx] [-endpoint=xxx] [-i=xxx] [-k=xxx] [-t=xxx]

Examples

In Windows, run obsutil sign obs://bucket-test/test.txt to generate a single object download link:

obsutil sign obs://bucket-test/test.txt

Download url of [obs://bucket-test/test.txt] is:
  http://your-endpoint/bucket-test/test.txt?AccessKeyId=xxxx&Expires=1552548758&Signature=xxxx

In Windows, run obsutil sign obs://bucket-test/test/ -r to generate object download links in batches:
```
obsutil sign obs://bucket-test/test/ -r

Generate download urls for objects . 

Generate the download url(s) for the objects in the bucket [bucket-test] finished 
Task id: af4dc692-6a88-4541-8156-ff1a889d2288
```
- If there are a large number of objects, obsutil saves the object download links to a specific file. The file name is associated with the task ID. For instance, the task ID in the example above is af4dc692-6a88-4541-8156-ff1a889d2288, so the file name should be sign_succeed_report_{timestamp}_af4dc692-6a88-4541-8156-ff1a889d2288.txt.
- By default, the file is stored under folder .obsutil_output in your user directory. You can also use parameter -o to specify a new folder.

Parameter Description

Parameter	Optional or Mandatory	Description
bucket	Mandatory	The bucket name
key	Optional	The object name used for generating the download link of a single object, or object name prefix used for generating download links of objects in batches
e	Optional (additional parameter)	The validity period of the generated download links of objects, in seconds. Minimum value: 60s. Default value: 300s
r	Mandatory when generating download links of objects in batches (additional parameter)	Generates the download links of objects in batches by a specified object name prefix.
exclude	Optional when generating download links of objects in batches (additional parameter)	The matching patterns of objects that are excluded, for example: .txt NOTE: The asterisk () represents any group of characters, and the question mark (?) represents any single character. For instance, *abc.txt indicates any file whose name starts with abc and ends with .txt*. You can use \ to represent * and \? to represent ?. If the name of the object to be downloaded matches the value of this parameter, the object is skipped. NOTICE: You are advised to use quotation marks for the matching pattern to prevent special characters from being escaped by the OS and leading to unexpected results. Use single quotation marks for Linux or macOS and double quotation marks for Windows. The matching pattern applies to the absolute path of an object, including the object name prefix and object name starting from the root directory. For example, if the path of an object in the bucket is obs://bucket/src1/src2/test.txt, then the absolute path of the object is src1/src2/test.txt. This matching pattern applies only to objects whose names do not end with a slash (/). Multiple exclude parameters can be specified, for example, *-exclude=.xxx -exclude=.xxx*.
include	Optional when generating download links of objects in batches (additional parameter)	The matching patterns of objects that are included, for example: .jpg NOTE: The asterisk () represents any group of characters, and the question mark (?) represents any single character. You can use \* to represent * and \? to represent ?. Only after identifying that the name of the file to be downloaded does not match the value of exclude, the system checks whether the file name matches the value of this parameter. If yes, the file is downloaded. If not, the file is skipped. NOTICE: You are advised to use quotation marks for the matching pattern to prevent special characters from being escaped by the OS and leading to unexpected results. Use single quotation marks for Linux or macOS and double quotation marks for Windows. The matching pattern applies to the absolute path of an object, including the object name prefix and object name starting from the root directory. For example, if the path of an object in the bucket is obs://bucket/src1/src2/test.txt, then the absolute path of the object is src1/src2/test.txt. This matching pattern applies only to objects whose names do not end with a slash (/). Multiple include parameters can be specified, for example, *-include=.xxx -include=.xxx*.
timeRange	Optional (additional parameter)	The time range matching pattern when generating download links of objects. Only the download links of objects whose latest modification time is within the configured time range are generated. This pattern has a lower priority than the object matching patterns (exclude/include). That is, the time range matching pattern is executed after the configured object matching patterns. NOTE: Time in the matching pattern is the UTC time. This matching pattern applies only to objects whose names do not end with a slash (/). The matching time range is represented in time1-time2, where time1 must be earlier than or the same as time2. The time format is yyyyMMddHHmmss. Automatic formatting is supported. For example, yyyyMMdd is equivalent to yyyyMMdd000000, and yyyyMM is equivalent to yyyyMM01000000. If this parameter is set to -time2, all files whose latest modification time is earlier than time2* are matched. If it is set to time1-, all files whose latest modification time is later than time1* are matched.
o	Optional when generating download links of objects in batches (additional parameter)	The folder that stores the result files. After the command is executed, result files (possibly success and failure files) will be created in the specified folder. The default value is .obsutil_output, a subfolder in the user's home directory where obsutil commands are executed. NOTE: A result file should be named as follows: sign_{succeed \| failed}_report_time_TaskId.txt. By default, the maximum size of a single result file is 30 MB and the maximum number of result files that can be retained is 1,024. You can set the maximum size and number by configuring recordMaxLogSize and recordBackups in the configuration file.
config	Optional (additional parameter)	The user-defined configuration file for executing the current command. To learn the parameters that can be configured in this file, see Configuration Parameters.
endpoint	Optional (additional parameter)	The endpoint
i	Optional (additional parameter)	The user's AK
k	Optional (additional parameter)	The user's SK
t	Optional (additional parameter)	The user's security token