Bash escape json Additional note. escape " in bash inside json. dump Properly gets the escaped string that bash will understand. Next, we just pipe some JSON data to You have to pipe to 4 different utilities just to get to a property in the JSON response body! Bash doesn’t understand JSON out of the box, and using the typical text manipulation tools like grep, sed, or awk, gets difficult. You are trying to ask about Bash arrays, and the syntax for those is Bash syntax. I'd like to escape single and double quotes while running a command under a different user. I use regexp replace: var data = evt. Single tics and back tics are not escaped in the JSON value. The Overflow Blog Robots building robots in a robotic factory. In this article, we will discuss how to convert JSON to hash in Ruby. Is there a way to escape these string variables when calling ExpandString? I can't seem to get an empty JSON {} to echo if an envvar is missing. Follow edited Dec 16, 2016 at 11:05. Hot Network Questions Book involving a massive alien spaceship under the arctic, horror/thriller I've got content in an XML file that looks like: <blah abc="def">123</blah> and a JSON string that looks like: { "thj": "abc" } and I want to merge the XML into the JSON using jq to get something like And as Steve B pointed out above, with his reference to the "gnu reference manual", you can't escape quotes in bash within the same type of quote. Bash: convert lower level JSON to escaped string. The only difference between Java strings and Json strings is that in Json, forward-slash (/) is escaped I am very new to bash scripting, please can someone point me in the right direction on how to accomplish my task? I have a curl call which returns a string, which I want to convert to json. How to parse and add content to json using bash? 1. In some ISO-8859-1 locales, U+00A0 no-break space is considered blank, including Solaris, the BSDs, and OS X (I think incorrectly). I have the following JSON file, foobarbaz. My bash script has a long curl call with a large -d json structure passed. Share. Thus, to easily create a string literal that contains a newline within the filename (e. json. Voila: you have a valid JSON string whose value is a JSON object. If you are passing a JSON fragment that you want to be used as JSON, not as a text string, then use - Definitely value to both approaches. However, if you’re working with data at the shell level in Bash, things aren’t always so simple. It In this tutorial, we’ll discuss character escaping in Bash. bash escaping quotes. If you want to be absolutely positive that message_body is valid JSON, use a JSON-specific tool such as jq to generate it; that'll cover all the corner cases -- literal quotes &c. 37. 1 Bash Variable within string, within string. rb -bash: bash; shell; variable; escape-characters; json. However, it also seems to have nesting depth limitations eric-mbp:~ ericstob$ prettify_json. escape triple quotes in curl correctly. 0. Your entire file is Within the manual, search for Convert to/from JSON. 31. The lines marked with "*****" below are the significant lines. However, I wasn't sure how to actually do this with escaped characters. json > filtered. All double quotes removed from command in tasks. how-do-i-use-bash-on-ubuntu-on-windows-wsl-for-my-vs-code-terminal. @ucbpaladin, <json. safe_load Method. asked Mar 22, 2022 at 21:22. It then gets interpreted again by the subshell. Quoting problems using jq in bash to replace json property with backslashes in content. Bash script - unable to replace string with double quotes and curly braces. How to install only the root packages in a Yarn Workspaces repo. I am using sed to perform this operation, but from what I can tell curly braces perform special functionality in sed and escaping them doesn't seem to be working. So I have to write a JSON file with bash script, and I know I can do something like echo 'something' > this will correctly handle variable values which contain literal quotes or other characters which need to be escaped to be correctly represented. There is no need to use curl if you have another language at your disposal but it does not mean you cannot use it. Expand for us on why a space needs to be escaped in JSON. safe_load Method Using JSON. And I already have the blocks extracted, I only need to substitute the existing block with the updated block. write bash-array to json with jq: one element per object. Convert all JSON string to JSON. Michael Michael. Send data to API containing special characters. Bash script escaping quotes. ["bash", "-c", "'command1 | command2 '"] generates an invalid argument vector; it's not a legitimate bash command with the inner single quotes. jo then creates a well formed JSON object with the keys: sni, key, and cert. . Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. The table below gives an overview of the escaping rules in these commonly used shells. The problem is that I need the output to be JSON. I've been looking for a way to uglify some JSON while in my bash console. The hint is that the space makes a difference. POST json data with cURL from a while loop - bash shell. par 1 Stéphane has noted that any other single-byte blank character from your locale also needs escaping. It would be easier to manage the quoting if you use single quotes around the JSON document string. Za. How can I convert/format a json string with bash. txt empties the file json. Luckily there’s a better way using a tool called jq. time = "'"${NOW}"'"' eating. In my acme. BASH: Convert a JSON value with control characters and escaped double quotes to Bash - convert an escaped JSON string to valid JSON. Indeed, Python would be simpler, but unfortunately Bash and similar shell utilities are required. Escaping shell character in groovy jenkins pipeline. asked Sep 15, 2019 at 13:18. We also Rule Of Thumb: In case you want explicitly representing single quote or double quotes in your string on bash, Use backslash (\) depends on your String Wrapper (should be in the same type). Escape quotes in jq. It can't do that in this context, so it complains. ) So a tab becomes the characters '\' and 't'. Peter Mortensen. Add a comment | 1 Answer Sorted by: Reset to default This didn't solve the problem however, but led me to search for "shell escape json" which in turn led me to: Best way to escape and unescape strings in Ruby? So: json = {"key" => "value that \"has\" quotes"}. json I get a JSON string that contains another JSON string in one data field, escaped with \\ and surrounded by " ". This will give a small example on how to use it. Try JSON. 47. 16. How to insert another JSON, in the POST cURL request JSON data? 0. I don't want to wrap every reference to it in double quotes, which would slow down my typing. d = {"key": "value"} "echo %s > /home/user/%s" % (simplejson. You're using -e unnecessarily, so that if your JSON data contained a \n sequence (which, in JSON, should be represented as exactly those characters) it would be In JSON, if the machine sees a backslash, it assumes that's telling it the next character is part of a special command, like "\n " saying "insert a new line. Since you're looping through the output of find, this is one of the simplest ways (!) to handle every possible path: You need to escape the backtick, but also escape the backslash: $ touch 1\` $ /bin/sh -c "ls 1\\\`" 1` The reason you have to escape it "twice" is because you're entering this command in an environment (such as a shell script) that interprets the double-quoted string once. However it is still inefficient to read 20GB file with a bash script. I am parsing some json data and I am in need of removing both beginning and ending curly braces, {}. The AWS cli command takes in a JSON string as a parameter. Michael. Let’s take a look at how easy it is to use jo to create some data: Rather than build up the By using the JSON-aware tool jq to convert the data into a JSON-encoded string, we ensure that the contents of the string is both a valid JSON string and that it may be To quickly extract the values for a particular key, I personally like to use "grep -o", which only returns the regex's match. this helps when you have escaped json that contains escaped json. Here using redirection, e. Escape strings sent in curl data when using application/json. In the most general case, you don't want to inject shell variables into a JSON document without encoding their contents. URL Variables in bash don't take a space on either side of =. First, we briefly describe how machines represent characters. Creating JSON from the command line or a shell script can be useful when: You need some ad-hoc JSON to interact with a JSON-consuming application Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company VSCode provides shell escaping when defining tasks. printf -v markdown_message_unescaped %b "<${{ env. Vy Do. In most common, sensible locales, at least those based on C or UTF-8, it's only the whitespace characters above. txt reads from the file json. load(sys. json file. Hot Network Questions Schmitt trigger confusion As shown above, the value of the package JSON object is an escaped JSON string containing the tracking and date fields. In this Curl POST JSON example, we send JSON to the ReqBin echo URL. How do you POST an entire json string from a Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company @mklement0 - (1) The question includes the phrase "from JSON file" and mentions a large number of fields. – Thanatos. From POSIX 9. Commented Sep 6, 2018 at 6:19 @Inian Plus the variable on the left side is written without the dollar sign. Bash sees a command like find . What is the best way to go about this? Here is the bash script: # Get hostname hostname=`hostname -A` 2> /dev/null # Get distro distro=`python -c 'import platform ; print platform. Table of Content Using JSON. [ "aa", "bb" ] The method in chbrown's answer adds an empty element to the end if the input ends with a linefeed, but you can use printf %s "$(cat)" to remove trailing linefeeds: How to use bash and curl with escaped json? 0. Modified 1 year, 10 months ago. The double quotes you already have will do what you are actually asking, but it This is nonsense; strings in JSON can only ever be double-quoted. I was able to use jq to parse and manipulate the stringified JSON though. Take out the first level of escaped quotes with sed and then jq can remove the last level. Viewed 436 times -1 I have a YAML file which I am converting into JSON files using yq. Hot Network Questions Trying to find a dragon book I read as a kid The reason you typically have to escape the parentheses in a find command is that parentheses have special meaning in bash. If the values do not contain ASCII control characters, which have to be escaped in strings in valid JSON, you can also use sed: Bash: JSON Array to Bash Array of Strings. Modify a key Stack Exchange Network. The question is unrelated to make per se. After that, we explore types of strings in Bash. curl command unable to pass bash parameter. Pass JSON via command line whilst command uses both sets of quotes. You just need to make sure you're using the correct quotes for the shell to recognize your string properly. My client library was generated by swagger, and was the reason I needed to apply these hacks, as the client library was stringifying my pre-stringified body escape " in bash inside json. to_json. 1. This online utility escapes all special bash (and other shell) characters with a backslash. The JSON spec is really simple and clear about this. How to use bash variable with double and single quotes. In your proposed YAML the triple quotes are fine when used as syntactic quotes that don't require further escaping in the contents, but trying to So, is it possible to not escape the double quotes surrounding the json key, make it easier to copy from somewhere and paste? bash; shell; quoting; json; Share. Bash script: Use string variable in curl JSON Post data. I'm trying to write a json dumps string using linux bash shell echo in a text file. Follow edited Sep 15, 2019 at 13:37. 14. The backslash (\) character is used to escape characters that otherwise have a special meaning, such as newline, backslash itself, or the quote character. json Hope this helps. I like to remove these before I parse them. Escaping a string lets you safely put it in other strings and You can also use jq -R . Using cURL to send JSON within a BASH script. The problem is that when you have a list in braces outside quotes, the shell performs Brace Expansion (bash manual, but ksh will be similar). Replace multiple values in json during run time. About I would say 'correctly formatted and escaped'! +1 – Brian Agnew. 2. Passing string with single quotes from jenkins to file. 52. See man bash and search for json; bash; groovy; jenkins-pipeline; escaping; Share. There is no escape sequence in JSON for single quotes, and a JSON string cannot be single-quoted. Properly escape JSON for use with bash. Similarly, I'm going to show how to use it with secrets manager below. You need to enclose the variables with double quotes. For example, to get the "text" field from tweets, something like: I have to send a POST request to some service with JSON payload, bash; curl; json. Using wildcards with "select()" in jq. String interpolation in Bash. dumps(d), 'textfile')) Output in textfile {key: value} It removes all double quotes so I can't load it to json because it is not a valid json I didn't downvote, but your use of cat is a UUOc` (Unnecessary Use Of cat). Giving: { "foo": & The problem is that the json can contain escaped strings as values and echoing them eliminates the escaping. Generally (very) Bash is a superset of those shells, so anything you escape in shell should be escaped in Bash. 3. linux_distribution()[1]'` 2> /dev/null # Get Escapes the characters in a String using Json String rules. The format isn't JSON, it just happens to contain stringified JSONs. Follow edited Mar 23, 2022 at 11:58. json > tmp. 55. 6k 22 22 gold Create a valid JSON string from either Bash or Ruby? Related. -H "content-type: application/json" -H "Authorization: Bearer testtoken" curl: (6) Could not resolve host: The echo'd headers match the at-shell usage, from above,-H "content-type: application/json" \ -H "Authorization: Bearer ${token}" \ How do I get the script's escaping right so it execs the same as the shell command? @sunknudsen bash doesn't have any built-in JSON capability; you either need an external program or to build it yourself from basic string manipulations You also need to escape double quotes and backslashes in the string, and convert non-ASCII characters to \u#### escape sequences. We can convert JSON to hash through different methods ranging from parsing JSON and JSON. Below is my Bash function that will escape JSON. In this case, using printf instead of jq would increase the complexity of the code due to the need to manually escape special characters Here is a crude way to do it: Transform JSON into bash variables to eval them. sh, is really handy for handing json formatted data to other tools, and using pass-through mode (-p) comes in quite handy for creating complex queries and outputting in json. Properly escaping Json command line option in bash script. Bash - convert an escaped JSON string to valid JSON. Tip: Use this notation if the property name contains special characters such as spaces, or begins with a character other than A. Visit Stack Exchange If you only use backslash escaping, many other characters also need escaping: backslash, single and double quotes, back quote, semicolon, ampersand, less- and greater-than, asterisk, question mark, etc. 17. How to escape double quotes in JSON. Escaping is only necessary if you want to put a file name as a literal in a script, or to pass several file names as a single input stream to another script. Next, the character escaping in pure Bash is discussed in jsonlint. ): In my case, a parent script using find was passing in the file name as "{}" which was causing my child script to receive the file name with the $ already interpolated. bash's one thing is to get shell-native data (environment variables, files, program output) to somewhere else, using JSON encapsulate it robustly. $$. Follow asked Apr 20, 2021 at 1:01. parse JSON Array with spaces in bash. #!/bin/bash Value4Variable=Value4 curl -s A single quote is actually a character that doesn't need to be escaped in JSON. UPDATE: Don't use this in production code. Paths separators in build config being escaped/stripped out prior to build command being run #35593. Linq; class Program { static void Main(string[] args) { string (1) defines a hashtable consisting of a single key with an associated value. A nice general rule would be "if in doubt, escape it". Below is the code i Along the way, we addressed common issues that you might encounter when parsing JSON in Bash, such as syntax errors and missing tools, providing you with solutions and workarounds for each problem. e "key4": "value4") by bash script? Using a dedicated JSON tool, How can I remove the ANSI escape sequences from a string in python. By using the JSON-aware tool jq to convert the data into a JSON-encoded string, we ensure that the contents of the string is both a valid JSON string and that it may be decoded into a valid JSON document containing the given key, my key, and value, my "value". Note that I've left the embedded double quotes in that string at the end, as I don't know if they are required or not. Modified 6 years, 7 months ago. When a JSON fragment is passed in this way, jq will naturally escape the bits of that string that needs to be escaped so that it's a valid JSON-encoded string. WSL, bash, VSCode 1. The query text in the JSON formatted values can hold different control characters like \n for newline, \t for tab, back tics `, single quotes ' and escaped double quotes ". My problem is it removes all double quotes. load MethodUsing YAML. By the way, when there are several moving parts (as there are here), it would be wise to try to isolate I am working with jq and I am trying to add a new JSON object to a new key to an existing file. Using a variable to execute a curl command. json: Permission denied comes from the fact you cannot write to the process. I have a situation where in my BASH script, I need to encode an environment variable to base64 and write it to a json file, which is then picked up by docker. Improve this question. extract specific key value from json in bash if key matches. This one will fail if the input isn't already JSON (sometimes that's what you want); it will create two separate output strings if given two separate JSON documents on input even with no newline or space between them; and it can make adjustments to the formatting (note the unnecessary space after the : being removed). while read line; do done <jsonfile is the proper way of feeding the while loop. Regression: WSL Shell Task command containing spaces fails. bash; shell; visual-studio-code; vscode-tasks; Share. Bash Bash - convert an escaped JSON string to valid JSON. How to prevent escaping when adding JSON object with jq? 1. json eating. Strings to json in bash. g pbpaste | sed -e 's/\\\"/\"/g' | jq -r – The Problem: I am trying to fetch credentials from AWS Secrets Manager in my terminal, however the Keys and Values I want needs to be in JSON, however they come with a lot of escape characters due to quotes. 9. I am not proposing to do the whole work Properly escaping Json command line option in bash script. IO; using Newtonsoft. Commented Jul 20, 2021 at 14:21. Other than that, there are a lot of bad practices here. Sending JSON with curl request in BASH File / SHELL script: JSON_PARSING_ERROR: Unexpected character (') 4. json So, first, I created my variable, then, I put the value I wanted in it, and, finally, using jq, I made the modification in a temporary file (specificities of the jq module I believe), and then put the modifications back in eating. If the file does not exist, check that your user has write permissions on the directory. NET, using JToken. using System; using System. Viewed 6k times Part of AWS and CI/CD Collectives In general, don't use parameter expansion to define JSON dynamically like this. Depending on the shell you use, the escaping rules are different. Parse to effectively unescape first, then parsing the result:. The @-means to read the body from STDIN, while << EOF means to pipe the script content until "EOF" as STDIN to curl. Ask Question Asked 6 years, 7 months ago. You need to escape the backslashes between the [[ and ]]. In Bash: tail -1 ${filepath}_newstap. |jq -s . You're leaving out a bunch of essential quoting, such that if one of your values contained a whitespace-surrounded * it would be replaced with a list of filenames. It's not too hard to handle that in Json. Re-injection. 1k 69 69 gold badges 250 250 silver badges 375 375 bronze badges. Escape variables in bash. Hot Network Questions What are these 16 Escape json tags in bash script or jq. 0 JSON for command-line arguments. json: { "example":{ "name": "stackOverflowQuestion" } } I want to add a new entry under example, so to get the following output in foobar. How to use json variable in shell $['im:rating'] Selects the specified property in a parent object. This allows you to reuse your Unix skills rather than learn new terse syntax or Domain Specific Language. txt, so they want to read from the file, so < is correct. json { "variable": { &q Skip to main content. Escaping double quotes inside command substitution. irb shows you the result in (2), which is the hashtable again. stdin);print obj;' you can inspect the structure of the nested dictonary obj and json; bash; escaping; jq; Share. Extracting data from a string in Bash. json | \ python -c 'import json,sys;obj=json. An aside on echo. Json. Sending CURL request with custom IP. File content to single JSON string value with bash. However, within this json string I am using a variable $ If you need to process more than just a simple line, I second @chepner's suggestion to use a JSON tool such as jq. If the string will be interpreted by something other than bash (even a different shell), that will sometimes produce completely inappropriate output. Saving backslash-escaped characters to variable in bash. In my Powershell to Json example, I used the -compress switch parameter. There is no guarantee that your template, combined with the contents of the variable, produces well-formed JSON. Passing a shell variable to a JSON request to curl? 4. Escape characters, literal quotations, and variables in KornShell (ksh) script command. How to process JSON with strings containing invalid UTF Explore several methods for converting Bash variables to a valid JSON string. txt and then writes to it. Related. Just wrap the whole thing in "". Click Run to execute the Curl POST JSON example The JSON value is within two double-quotes. In this case, the function tells jq Initially I was thinking of just injecting the json via an echo, something like below. Commented Jul 27, 2015 at 15:10. Here are a couple examples of what I have tried. json and you just want to insert the Use jq to properly JSON encode the data: printf '%s' "$MY_DATA" | jq -sR . Deals correctly with quotes and control-chars (tab, backslash, cr, ff, etc. The key is to use a character that doesn't appear in the user input to delimit the selector address. 11. I'm using jq inside a bash script, to parse a JSON returned by an API REST service This is my code (getting . How to escape a JSON variable posted with curl in bash script? 2. I am having trouble getting the AWS cli working nicely with a bash variable. stackerstack stackerstack. It would be better (more robust) to use a JSON-aware tool to create the JSON document and to insert the wanted values. The list is pretty much unbounded since newer shells/features often give special meaning to (unquoted) characters that were not previously special. Convert String to JSON in bash-1. As you can see, the response gave me escaped JSON with \ in front of every " character for the actual contents of the secret. how to convert json file data to string in bash shell script? Hot Network Questions Hodge Star Operator Causing Sign Change Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company You shouldn't have the extra quotes in your input JSON to begin with. Since it's not clear what is actually needed, I thought a generally useful answer would be more generally useful :-)) (2) The question mentions "escape sequence characters" generally, and TAB, NL and CR specifically, whereas the solution you mention in these how can I add and remove a new key (i. Be sure to put single quotes around the property name. For example, "My name is ${var_1}" may become "My name is a "new" name". To make it work in the json files, I placed \n into the string, Note that this solution decode the unicode "\uxxxx" escape sequences, unlike the Python one with json. How to escape strings in bash script. JSON data is passed as a string. Viewed 141 times 0 This might easy thing that i am missing, but i have a script for single host now i want create same script for all host. Bash: JSON Array to Bash Array of Strings. A JSON parser would properly decode the escaped quotes when it's reading the data. Thankfully, jq has built-in functionality for this! Escapes or unescapes a JSON string removing traces of offending characters that could prevent parsing. $'first-line\nsecond-line') , Characters that need escaping are different in Bourne or POSIX shell than Bash. how to escape double quotes in bash inside jenkins? 0. Follow (Comment before @pacholik answered): What if you're using find and you don't have the option to type single quotes? (Additional Information after @pacholik, responsed. 15. how can i pass the json without escape sequence in curl? 549. How to parse and add content to json using bash? 8. – It is tedious to write such escaped json strings, as one needs to escape each double quote " to \". As one poster shows, this is possible, but escaping a space does not change the meaning of the JSON, and only increases its size — ie, you are probably doing something wrong. runuser -l username -c " Adding object string to array using jq doesn't translate escape characters. Single quotes not escaped in debug commands #91578. I suspect the ding comes from the fact that parsing json or xml in bash This is basically JSON encoded as a JSON string - after doctoring the end of your string very slightly, as per comments. Commented May 19, 2011 at 22:54. function escape_json_string() { local input=$1 for ((i = 0; i < ${#input}; i++)); do local char="${input:i:1}" local I had to escape some JSON for inclusion in other JSON, and there's a really simple solution: If you have an existing JSON document in file. Your -bash: process. " When you escape a slash, you say "no, really, I want a literal slash here, the next character coming up is not special" – You don't need to escape any file names you are handling in a script. jq -n "[{\"command\": [\"printf 'this is a text'\"]}]", this is fine however the json string is passed in from a function, I can replace all double quotes with \" first and then run the jq command but it's not very elegant. Pass specical characters as HTTP POST with CURL. bash-3. Passing environment variable in bash script for the value which need to have double quotes. Unless you are concatenating files, if you find yourself doing cat somethingelse, then it is probably a UUOc. Building up a JSON string and battling escape characters is no picnic and wastes time. All the above having been said If on the other hand, you had a json string and needed to edit it without fuss, you could use the ConvertFrom-Json cmdlet, then edit the resulting object as needed and convert it back to json again before passing it down. sh deployment script, I tell jo to read the TLS files directly from disk (with the @ prefix). /special_dir" -prune ) and tries to interpret those parentheses as shell syntax instead of literal characters that you want to pass to your command. load to using YAML. My question is: Given the content { "id": 1, "name": How to properly pack regex that contains both double as well as single quotes into a variable and evaluate it in Bash? 8. json && mv tmp. The JSON content type is set using the -H "Content-Type: application/json" command line parameter. declare -a NOW NOW=$(date) jq '. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I too needed to send a TLS certificate to a server as JSON. This layout may be easier to read than using separate files or the "echo a variable" approach. The others are mostly for testing and demonstration. jq can simplify the above bash to this: I'm new to bash after years with tcsh. VALUE refers to one single line in json. Anything that you enter in the input textbox on the left will get escaped on the right. This only works for: JSON which does not contain nested arrays, and; JSON from trustworthy sources (else it may confuse your shell script, perhaps it may even be able to harm your system, You have been warned) Well, yes, it uses PERL to do this job, thanks to CPAN, but is small enough for Is there a reliable way to store a short bit of JSON in a bash variable for use in a AWS CLI command running from the same script? I'll be running a job from Jenkins that's updating an AWS Route53 record, which requires UPSERTing a JSON file with the change in records. The jq utility has a separate option, --argjson, for when the passed data is a JSON document. This tool, JSONPath. Problems escaping a variable when using echo. How to process JSON with strings containing invalid . 1 How to use bash variable with double and single quotes. 2$ echo "${X:-{}}" {} bash-3 You might be able to use this technique to protect the selector. sh, we can clone the Git repository or simply download it as an archive. And in fact, don't need to escape them within alternate quotes, e. BASH: Convert a JSON value with control characters and escaped double quotes to printable plain text. This means that jq will JSON-encode the given text into a string. To use JSON. You want the data to contain the " right? so you want to escape the " with a single slash on the shell, Escaping JSON string inside Jenkinsfile shell. This help using it afterward in another command (for example, to pass json inline to httpie). I have a shell variable that I need to use often to refer to a folder with spaces in its name. You've encountered a shell issue: you are missing quotation marks around $(<$1). I have the below code for this: USER Following command works on bash shell but YAML parser (bitbucket-pipelines. The benefit of using jq is that it ensures that all data is properly formatted and You are lacking escapes on a few quotes and backslashes at the end. For the purposes of this question let's say I want to echo the following on the screen: 'single quote phrase' "double quote phrase" I try to get area of JSON created by kubectl as another user. 5. Start Here; Bash, Dash, and Zsh, while arguably producing results that are easier to parse. Hot Network Questions Still seems to break on me an just returns: -bash: !DOCTYPE: event not found – ralphthemagician. I either have a trailing } in the output if set, or the escape displays. . yaml) reports it as invalid syntax https: How to escape JSON in YAML. Stack Overflow. e. Now when I look at the JSON representation of h, irb escapes the inner quotes in (3), while (4) shows that the backslashes are not "really" there. "'" is a valid single-quote string and '"' is a valid double-quote string without requiring any escaping. The problem is, when a variable contains double quotation mark, then calling ConvertFrom-Json will fail because the quotation mark is not escaped. It generates the following output, { "a" : 1, "b" : 2 Doing it this way ensures that any characters that need special escaping are properly escaped for inclusion into the JSON strings in the document. diner. -e enable interpretation of the following backslash escapes [] \a alert (bell) \b backspace \c suppress further output \e escape character \f form feed \n new line \r carriage return \t horizontal tab \v vertical tab \\ backslash \0nnn the character whose ASCII code is bash's printf %b format escapes and/or quotes strings suitably for interpretation by bash. Ask Question Asked 1 year, 10 months ago. Extract JSON from a string with plain text and JSON. data. JSON needs to be replaced because a particular implementation of a JSON serializer outputs some JSON that (while being entirely valid JSON) has some extra characters so it can also be dropped into an HTML script element as a JS literal?!That isn't so much throwing the baby out with the bathwater as throwing the baby out because someone bought him a set of water wings. com from this website you can validate your json. Yes you need a dependency but it is still bash. -not ( -path ". linux_distribution()[0] + " " + platform. Because I wanted to use this programmatically, I needed to parse the JSON further with jq. But make does not support Bash as the shell other than by explicitly setting SHELL=/bin/bash and even then your question does not seem to be repeatable. Here you'll find examples of correct escaping and quotes when passing JSON objects on the command line using different shells. The solution I propose is to use node and curl inside a bash script. Read JSON arrays into a Bash array. parse("'foo'") in your browser console, for example, and observe the SyntaxError: Unexpected token '. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company bash; wildcards; escape-characters; json; jq. {"a":"\"Hello\""} -> {"a":""Hello""} bash; sh; Share. to format each line as a JSON string and then jq -s (--slurp) to create an array for the input lines after parsing them as JSON: $ printf %s\\n aa bb|jq -R . – The way to include a literal -in a character list is to put it in the first or last position of the bracket expression, exactly as shown in the answer at: Get final special character with a regular expression. The issue is twofold: You are handing JSON to jq using --arg, which expects text. sh Share. But escaping some characters gives them a special meaning, like \n. Bash adds extra single quotes in multi line variable. count value) How to echo a jq JSON with double quotes escaped with backslash. 2$ unset X bash-3. account0=exampleName; Bash escape character. This is optional. Unless jq is told to use a non-JSON output format, it literally cannot emit content which is not valid JSON. How can I escape double quotes inside a double string in Bash? For example, A workaround is using a variable to hold the result of which, but is bash really incapable of escaping a quote or am I doing something wrong? – Luc. It shouldn't be var = 1 but var=1 – Inian. json in I am trying to replace qa_test_services by test_services using bash in JSON file, could someone please help me with this ? thanks JSON file - variables. Jeff Escape bash special characters inside double quotes. body contains $, it will be translated as a variable. The reason the JSON quotes appear to have been "lost" is that, in the third line, the first " in the JSON string closes the quoted Bash string starting with the " in echo "Script, and so on all the way to the last " in the JSON string, Difficulty escaping quote character in powershell script (Azure Devops Yaml) 1. txt, whereas >json. Merging json files using jq. The OP here is using cat json. KSH: Properly escape JSON for use with bash. Double quotes in JSON must be escaped with the backslash "\" on Windows computers. If you would use: $ cat members. Switching the parent to use '{}' Properly escaping Json command line option in bash script. I also thought about escaping all double quotes e. 42k 72 72 gold badges 201 201 silver badges 359 359 bronze badges. I'm having trouble with escaping characters in bash. 1. In this example, I pipe that JSON document to curl via STDIN and curl posts it to EDIT: Check if the api you’re interacting with is set to Content-Type: application/json, &/or if your client http library is both stringify-ing and parsing the http request body behind the scenes. The -s ( --slurp ) and -R ( --raw-input ) options, when used together, will read the raw input data and Here we use jq, a powerful command-line JSON processor, to make the conversion of Bash variables to a JSON string much more robust. Modified 5 years, 7 months ago. Escapes any values it finds into their Json String form. When using --arg to pass data into a jq variable, the data in the variable will always be treated as a string. Note that injecting the values of shell variables into JSON documents may result in broken JSON strings due to the lack of encoding special values. So, to unescape the JSON string, we can use the fromjson function of the jq tool. 0 Bash scripting, cannot substitute a command @Walf, for clarification, $'escape-these-chars' is the ANSI-C quoting feature of Bash that causes all characters within the specified string to be escaped. How to insert another JSON, in the POST cURL request JSON data? Hot Network Questions An almost steam-punk short fiction about robot childcarers I am running the following code, but if env. 5 RE Bracket Expression: The character shall be treated as itself if it occurs first (after an initial ^, if any) or last in the list, or as an ending range point in a So I have a bash script which outputs details on servers. g. z_. example code. – Properly escape JSON for use with bash. Is there a better way to handle the single quotes inside a json string? And the right way to do it is to use jq to generate safely-escaped JSON containing your literal values: # GOOD: Result will always be syntactically valid JSON. Curl can post binary data from a file so I have been using process substitution and taking advantage of file descriptors whenever I need to post something nasty with curl and still want access to the vars in the current shell. Tada. json However the echo seems to escape out all of the quote marks so my file will If you need to print variables, use the cat << EOF construct, which utilizes the Here Document redirection built into Bash. Escaping characters in bash (for JSON) Related. Follow edited Mar 4, 2020 at 18:48. It will be better to say: grep -F '"\"country_code\":\"US\","' file. An automated solution involves the purpose-built utility jo. From the bash perspective curl is an external command just as node is. json. Ask Question Asked 5 years, 7 months ago. Using jq to compose the JSON document from a simple template: Explore many ways to handle JSON in the shell. 3. Double Interpolation of Array in Bash. 4. parse MethodUsing JSON. bonus: if you want to escape quotes you can use sed: pbpaste | sed -e 's/\\\"/\"/g'. Escaping multi-line text with "jq" 2. tool. The following characters are reserved in JSON and must be properly escaped to be used in strings: Backspace is replaced with \b; Form feed is replaced with \f; Newline is replaced with \n; Carriage return is replaced with \r; Tab is replaced I remembered another way to do this with a "Here Document" as described in the Bash man page and detailed here. Improve this answer. Commented Aug 28, 2012 at 18:48.
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