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import subprocess
from . import base
class ViewProtobuf(base.View):
"""Human friendly view of protocol buffers
The view uses the protoc compiler to decode the binary
"""
name = "Protocol Buffer"
prompt = ("protobuf", "p")
content_types = [
"application/x-protobuf",
"application/x-protobuffer",
]
@staticmethod
def is_available():
try:
p = subprocess.Popen(
["protoc", "--version"],
stdout=subprocess.PIPE
)
out, _ = p.communicate()
return out.startswith("libprotoc")
except:
return False
def decode_protobuf(self, content):
# if Popen raises OSError, it will be caught in
# get_content_view and fall back to Raw
p = subprocess.Popen(['protoc', '--decode_raw'],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
out, err = p.communicate(input=content)
if out:
return out
else:
return err
def __call__(self, data, **metadata):
decoded = self.decode_protobuf(data)
return "Protobuf", base.format_text(decoded)
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