Error reporting

How API signals operation error

set S3 err

Operation returns expression evaluated as false and "err" with "errstr" are populated from response content

set network error

Populates S3 err with "network_error" constant and S3 errstr with http status line (eg: "404 Not Found") and throws.

confess

Operation throws using "confess"

Feature support

For details see corresponding "api-operation" / "client-operation" test file

 |-----------------------+----------------------------+--------------------------|
 | operation             | Net::Amazon::S3 (API)      | Net::Amazon::S3::Client  |
 |-----------------------+----------------------------+--------------------------|
 | service-buckets-list  |                            |                          |
 | - returns             | Bucket instances in struct | Bucket instances (list)  |
 | - errors              | set S3 err                 | confess                  |
 |-----------------------+----------------------------+--------------------------|
 | bucket-acl-get        |                            |                          |
 | - returns             | response body (XML)        | response body (XML)      |
 |                       | (undef on Not Found)       |                          |
 | - errors              | set network error          | confess                  |
 |                       | (none on Not Found)        |                          |
 |-----------------------+----------------------------+--------------------------|
 | bucket-acl-set        |                            |                          |
 | - with canned acl     | yes, as acl_short          | N/A                      |
 | - with xml acl        | yes, as acl_xml            | N/A                      |
 | - returns             | boolean                    | N/A                      |
 | - errors              | set S3 err                 | N/A                      |
 |-----------------------+----------------------------+--------------------------|
 | bucket-create         |                            |                          |
 | - with region         | yes                        | yes                      |
 | - returns             | Bucket instance            | Bucket instance          |
 | - errors              | set S3 err                 | confess                  |
 |-----------------------+----------------------------+--------------------------|
 | bucket-delete         |                            |                          |
 | - returns             | boolean                    | true                     |
 | - errors              | set S3 err                 | confess                  |
 |-----------------------+----------------------------+--------------------------|
 | bucket-objects-list   |                            |                          |
 | - list version 1      | yes                        | yes                      |
 | - list version 2      | no                         | no                       |
 | - common prefixes     | supported                  | not supported            |
 | - list all            | list all method            | yes                      |
 | - returns             | struct with list           | iterator (Object list)   |
 | - errors              | set S3 err                 | confess during iteration |
 |-----------------------+----------------------------+--------------------------|
 | bucket-objects-delete |                            |                          |
 | - returns             | boolean                    | HTTP::Response object    |
 | - errors              | set S3 err                 | confess                  |
 |-----------------------+----------------------------+--------------------------|
 | object-acl-get        |                            |                          |
 | - returns             | response body (XML)        | N/A                      |
 |                       | (undef on Not Found)       | N/A                      |
 | - errors              | set network error          | N/A                      |
 |                       | (none on Not Found)        | N/A                      |
 |-----------------------+----------------------------+--------------------------|
 | object-acl-set        |                            |                          |
 | - with canned acl     | yes, as acl_short          | N/A                      |
 | - with xml acl        | yes, as acl_xml            | N/A                      |
 | - returns             | boolean                    | N/A                      |
 | - errors              | set S3 err                 | N/A                      |
 |-----------------------+----------------------------+--------------------------|
 | object-copy           |                            |                          |
 | - returns             | boolean                    | N/A                      |
 | - errors              | set S3 err                 | N/A                      |
 |-----------------------+----------------------------+--------------------------|
 | object-create         |                            |                          |
 | - returns             | boolean                    | empty string             |
 | - errors              | set S3 err                 | confess                  |
 |-----------------------+----------------------------+--------------------------|
 | object-delete         |                            |                          |
 | - returns             | boolean                    | true                     |
 | - errors              | set S3 err                 | confess                  |
 |-----------------------+----------------------------+--------------------------|
 | object-fetch          |                            |                          |
 | - returns             | struct with value          | value                    |
 |                       | (undef on Not Found)       |                          |
 | - errors              | set network error          | confess                  |
 |                       | (none on Not Found)        |                          |
 |-----------------------+----------------------------+--------------------------|
 | object-head           |                            |                          |
 | - returns             | boolean                    | N/A                      |
 | - errors              | set S3 err                 | N/A                      |
 |-----------------------+----------------------------+--------------------------|

TODO plan (asorted, not promised)

normalize error reporting

Make every operation to behave similar (especially "Net::Amazon::S3"

make error reporting pluggable

With possibility to inject user's own reporting

unify features

Both APIs should support same set of operations

support all AWS S3 operations and x-amz-* headers

https://docs.aws.amazon.com/AmazonS3/latest/API/Welcome.html

add async API (AnyEvent / IO::Async)