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Join Stack Overflow to learn, share knowledge, and build your career, jason flanagan binary options. Connect and share knowledge within a single location that is structured and easy to search. The JSON format natively doesn't support binary data. The binary data has to be escaped so that it can be placed into a string element i. zero or more Unicode chars in double quotes using backslash escapes in JSON.
An obvious method to escape binary data is to use Base However, Base64 has a high processing overhead. One use case for this is the v0. You create data objects via a REST-Webservice using JSON, e, jason flanagan binary options. There are 94 Unicode characters which can be represented as one byte according to the JSON spec if your JSON is transmitted as UTF With that in mind, I think the best you can do space-wise is base85 which represents four bytes as five characters.
Final verdict: base64 wins, jason flanagan binary options, in my opinion, on the grounds that it's common, easy, and not bad enough to warrant replacement. Jason flanagan binary options also: Base91 and Base By sending a multipart form you send first as string your JSON meta-dataand then jason flanagan binary options send as raw binary image s jason flanagan binary options, wavs, etc indexed by the Content-Disposition name.
Here's a nice tutorial on how to do this in obj-c, jason flanagan binary options, and here is a blog article that explains how to partition the string data with the form boundary, and separate it from the binary data. The only change you really need to do is on the server side; you will have to capture your meta-data which should reference the POST'ed binary data appropriately by using a Content-Disposition boundary.
Granted it requires additional work on the server side, but if you are sending many images or large images, this is worth it. Combine this with gzip compression if you want. BSON Binary JSON may work for you. Edit: FYI the. NET library json. net supports reading and writing bson if you are looking for some C server side love.
The problem with UTF-8 is that it is not the most space efficient encoding. Also, some random binary byte sequences are invalid UTF-8 encoding. So you can't just interpret a random binary byte sequence as some UTF-8 data because it will be invalid UTF-8 encoding.
The benefit of this constrain on the UTF-8 encoding is that it makes it robust and possible to locate multi byte chars start and end whatever byte we start looking at.
As a consequence, if encoding a byte value in the range [ Worse than that. So the binary data would require some transformation to be properly encoded. Let see. If we assume uniformly distributed random byte values in our binary data then, on average, half of the bytes would be encoded in one bytes and the other half in two bytes.
What about using another Base encoding? In UTF-8, encoding the ASCII values is the most space efficient. In 8 bits you can store 7 bits. Better than Base Unfortunately we can't use this easy trick because JSON doesn't allow some ASCII chars.
The 33 control characters of ASCII [ But a Base93 encoding would not be as convenient as a Base64 encoding. Base64 requires to cut the input byte sequence in 6bit chunks for which simple bitwise operation works well. This is why I came independently to the common conclusion that Base64 is indeed the best choice to encode binary data in JSON. My answer presents a justification for it. I agree it isn't very attractive from the performance point of view, but consider also the benefit of using JSON with it's human readable string representation easy to manipulate in all programming languages.
If performance is critical than a pure binary encoding should be considered as replacement of JSON. But with JSON my conclusion is that Base64 is the best.
If you deal with bandwidth problems, try to compress data at the client side first, then baseit. It reduces the overhead over previous US-ASCII-based encoding methods by using an 8-bit Extended ASCII encoding method. By yEnc became the de facto standard encoding system for binary files on Usenet, jason flanagan binary options. For example on Java platform there are libraries that can do the job rather efficiently, so that overhead is mostly due to expanded size. Smile format.
Since you're looking for the ability to shoehorn binary data into a strictly text-based and very limited format, I think Jason flanagan binary options overhead is minimal compared to the convenience you're expecting to maintain with JSON. If processing power and throughput is a concern, then you'd probably need to reconsider your file formats.
The Google Gears team ran into the lack-of-binary-data-types problem and has attempted to address it:. Blob API. JavaScript has a built-in data type for text strings, but nothing for binary data. The Blob object attempts to address this limitation. Just to add the resource and complexity standpoint to the discussion. A multi-part message is often used as a savior but for simplicity reason and for more complex tasks, I prefer the idea of giving the content as a whole.
It is self-explaining and it is simple. And yes JSON is something crippling but in the end JSON itself is verbose, jason flanagan binary options. And the overhead of mapping to BASE64 is a way to jason flanagan binary options. Also liking the BSON approach, this is not that widely and easily supported as one would like it to be. Basically, we just miss something here but embedding binary data jason flanagan binary options base64 is well established and way to go unless you really have identified the need to do the real jason flanagan binary options transfer which is hardly often the case.
I dig a little bit more during implementation of baseand expose that when we send characters which ascii codes are bigger than then browser chrome in fact send TWO characters bytes instead one :. The reason is that JSON by defaul use utf8 characters for which characters with ascii codes above are coded by two bytes what was mention by chmike answer.
Then we look inside that json file:. append "above", "¼½ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüý" ; req. If you want more reliability by sacrificing size, replace "binary" with "base64". Data type really concerns. I have tested different scenarios on sending the payload from a RESTful jason flanagan binary options. For encoding I have used Base64 Apache and for compression GZIP java. The payload contains information about film,an image and an audio file.
I have compressed and encoded the image and audio files which drastically degraded the performance. Encoding before compression turned out well. Image and audio content were sent as encoded and compressed bytes []. It describes a way to transfer binary data between a CDMI client and server using 'CDMI content type' operations without requiring base64 conversion of the binary data.
An old school method that's been around since three years after the dawn of time would be the Intel HEX format. It was established in and the UNIX epoch started on January 1, One other, more novel idea, is to encode the data via uuencode. It's a mostly deprecated, but it could still be an alternative.
Although perhaps not a serious one. My solution now, XHR2 is using ArrayBuffer. The ArrayBuffer as binary sequence contains multipart-content, video, audio, jason flanagan binary options, graphic, text and so on with multiple content-types. All in One Response. In modern browser, having DataView, StringView and Blob for different Components, jason flanagan binary options. html for more details. People who code: we want your input.
Take the Survey. Sign up with email Sign up Sign up with Google Sign up with GitHub Sign up with Facebook. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Binary Data in JSON String. Something better than Base64 Ask Question.
Asked 11 years, 8 months ago. Active 3 months ago. Viewed k times. json base Improve this question. edited May 3 '17 at
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10/4/ · First we have here The Irish Method presented by Jason Flanagan. But wait, doesn’t Flanagan have the exact same face as Pertu? Yes he does, because as mentioned earlier, it is the same binary options scam. De Hollandse Methode2/5 8/11/ · The former CEO of Citrades pleaded guilty today for his role in a scheme to defraud investors out of $ million in the United States and across the world in financial instruments known as “binary options,” announced Assistant Attorney General Brian A. Benczkowski of the Justice Department’s Criminal Division and Assistant Director in Charge Nancy McNamara of the FBI’s Washington Field Estimated Reading Time: 2 mins 17/9/ · The binary data has to be escaped so that it can be placed into a string element (i.e. zero or more Unicode chars in double quotes using backslash escapes) in JSON. An obvious method to escape binary data is to use Base However, Base64 has a high processing overhead
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