Only use status text as error message

This release fixes a bug introduced in the previous release which included full response bodies as error messages.
#108

Treat [200...399] status code range as errors

This release fixes a bug that didn't treat responses with status codes outside the [200...399] range as errors. Thanks to @davideicardi for reporting it.

Dump command

This release implements a dump command which outputs piped attack results in different formats.

$ vegeta dump -h
Usage of vegeta dump:
  -dumper="": Dumper [json, csv]
  -inputs="stdin": Input files (comma separated)
  -output="stdout": Output file

-inputs

Specifies the input files containing attack results to be dumped. You can specify more than one (comma separated).

-output

Specifies the output file to which the dump will be written to.

-dumper

Specifies the dump format.

json

Dumps attack results as JSON objects.

csv

Dumps attack results as CSV records with six columns.
The columns are: unix timestamp in ns since epoch, http status code,
request latency in ns, bytes out, bytes in, and lastly the error.

Histogram reporter

This release adds the hist[buckets] reporter to the report command which computes and prints a text based latency histogram for the given buckets. Here's an example of using it.

$ cat results.bin | vegeta report -reporter='hist[0,2ms,4ms,6ms]'
Bucket         #     %       Histogram
[0,     2ms]   6007  32.65%  ########################
[2ms,   4ms]   5505  29.92%  ######################
[4ms,   6ms]   2117  11.51%  ########
[6ms,   +Inf]  4771  25.93%  ###################

Thanks to @bgentry for stirring up the discussion on this feature!

Extended targets language

This release extends the targets language to support custom per-target headers and bodies in a fully backwards compatible way.

Simple targets

GET http://goku:9090/path/to/dragon?item=balls
GET http://user:password@goku:9090/path/to
HEAD http://goku:9090/path/to/success

Targets with custom headers

GET http://user:password@goku:9090/path/to
X-Account-ID: 8675309

DELETE http://goku:9090/path/to/remove
Confirmation-Token: 90215
Authorization: Token DEADBEEF

Targets with custom bodies

POST http://goku:9090/things
@/path/to/newthing.json

PATCH http://goku:9090/thing/71988591
@/path/to/thing-71988591.json

Targets with custom bodies and headers

POST http://goku:9090/things
X-Account-ID: 99
@/path/to/newthing.json

Shout out to @cwinters for sparking up this discussion and contributing to the implementation.

Keepalive option

This release adds a -keepalive option to the attack command which allows disabling HTTP keepalives.
Apart from that, we're now treating 3xx response codes as successes instead of errors.
Credit to @jpfuentes2 for the keepalive change set.

Fix missing report output bug and add FreeBSD and Windows releases

This release fixes a bug which made report occasionally exit without producing any output.
This bug was reported here.

Besides this bug fix, I'm including FreeBSD and Windows binaries for the first time.

Workers option and graceful shutdown

This release is a backwards compatible release which adds a workers options to the attack command and signal handling to all commands which enables graceful shutdowns at any point during the attack execution.
It addresses issue #80 and lays groundwork for solving #53, #81 and #82.

Add Wait field to Metrics and include it in ReportText

This release is a full backwards compatible release. It just extends the Metrics struct with the Wait field which represents the time waiting for all responses to come back. This information is included in the output of ReportText too. Example (see change in Duration):

Requests      [total]                   1200
Duration      [total, attack, wait]     10.094965987s, 9.949883921s, 145.082066ms
Latencies     [mean, 50, 95, 99, max]   113.172398ms, 108.272568ms, 140.18235ms, 247.771566ms, 264.815246ms
Bytes In      [total, mean]             3714690, 3095.57
Bytes Out     [total, mean]             0, 0.00
Success       [ratio]                   55.42%
Status Codes  [code:count]              0:535  200:665
Error Set:
Get http://localhost:6060: dial tcp 127.0.0.1:6060: connection refused
Get http://localhost:6060: read tcp 127.0.0.1:6060: connection reset by peer
Get http://localhost:6060: dial tcp 127.0.0.1:6060: connection reset by peer
Get http://localhost:6060: write tcp 127.0.0.1:6060: broken pipe
Get http://localhost:6060: net/http: transport closed before response was received
Get http://localhost:6060: http: can't write HTTP request on broken connection

Lazy mode and streaming optimisations

This release includes a number of optimisations, deprecations, and API changes:

• -lazy flag added to the attack command. This enables reading infinite streams of input targets.
• Hit results are now streamed out of attack as soon as they arrive. Before, all hits would have to finish before sending the results out.
• The report command can now read its inputs concurrently and is responsible for aggregating and sorting them.
• Removed order attack option as well as the associated library code. Randomizing the order of targets can be easily achieved outside of Vegeta.
• Removed the attached Encode, Decode and Sort methods of the Results type. These were just clutter passthroughs.

Of course, these changes are reflected in the library too. For instance, whereas before you'd invoke Attack with a slice of Targets, now you need to provide a Targeter. Please refer to the updated godocs.

This is a rather massive release in terms of code changes but the improvements are worth it. Please report any bugs or inconsistencies.

Cheers,
Tomás