Parse JSON data using jq and curl from command line - json

Question

I would like to parse JSON data using jq and curl from command line but I haven't been successful. In fact, I would like to get the value of response > textAnnotations > description but i'm doing something wrong. Here is my command :
curl -X POST > response.txt \
-H "Content-Type: application/json; charset=utf-8" \
--data "{
'requests': [
{
'image': {
'source': {
'imageUri': 'http://adn-cdn2.avadeo.net/articles/vignettes/grandes/146.jpg'
}
},
'features': [
{
'type': 'TEXT_DETECTION'
}
]
}
]
}" "https://vision.googleapis.com/v1/images:annotate?key=XXXXXXXXXXXXXXXXXXX" | jq -r '.responses.textAnnotations.description'
And here is the Curl answer if I do not filter with JQ :
{
"responses": [
{
"textAnnotations": [
{
"locale": "und",
"description": "24\nmois\n12\nmois\n",
"boundingPoly": {
"vertices": [
{
"x": 12,
"y": 24
},
{
"x": 285,
"y": 24
},
{
"x": 285,
"y": 206
},
{
"x": 12,
"y": 206
}
]
}
},
{
"description": "24",
"boundingPoly": {
"vertices": [
{
"x": 216,
"y": 24
},
{
"x": 285,
"y": 24
},
{
"x": 285,
"y": 83
},
{
"x": 216,
"y": 83
}
]
}
},
{
"description": "mois",
"boundingPoly": {
"vertices": [
{
"x": 223,
"y": 83
},
{
"x": 280,
"y": 84
},
{
"x": 280,
"y": 110
},
{
"x": 223,
"y": 109
}
]
}
},
{
"description": "12",
"boundingPoly": {
"vertices": [
{
"x": 12,
"y": 122
},
{
"x": 81,
"y": 122
},
{
"x": 81,
"y": 179
},
{
"x": 12,
"y": 179
}
]
}
},
{
"description": "mois",
"boundingPoly": {
"vertices": [
{
"x": 19,
"y": 177
},
{
"x": 76,
"y": 176
},
{
"x": 76,
"y": 205
},
{
"x": 19,
"y": 206
}
]
}
}
],
"fullTextAnnotation": {
"pages": [
{
"width": 300,
"height": 225,
"blocks": [
{
"boundingBox": {
"vertices": [
{
"x": 216,
"y": 24
},
{
"x": 285,
"y": 24
},
{
"x": 285,
"y": 83
},
{
"x": 216,
"y": 83
}
]
},
"paragraphs": [
{
"boundingBox": {
"vertices": [
{
"x": 216,
"y": 24
},
{
"x": 285,
"y": 24
},
{
"x": 285,
"y": 83
},
{
"x": 216,
"y": 83
}
]
},
"words": [
{
"boundingBox": {
"vertices": [
{
"x": 216,
"y": 24
},
{
"x": 285,
"y": 24
},
{
"x": 285,
"y": 83
},
{
"x": 216,
"y": 83
}
]
},
"symbols": [
{
"boundingBox": {
"vertices": [
{
"x": 216,
"y": 25
},
{
"x": 248,
"y": 25
},
{
"x": 248,
"y": 76
},
{
"x": 216,
"y": 76
}
]
},
"text": "2"
},
{
"property": {
"detectedBreak": {
"type": "EOL_SURE_SPACE"
}
},
"boundingBox": {
"vertices": [
{
"x": 255,
"y": 24
},
{
"x": 285,
"y": 24
},
{
"x": 285,
"y": 83
},
{
"x": 255,
"y": 83
}
]
},
"text": "4"
}
]
}
]
}
],
"blockType": "TEXT"
},
{
"boundingBox": {
"vertices": [
{
"x": 223,
"y": 83
},
{
"x": 280,
"y": 84
},
{
"x": 280,
"y": 110
},
{
"x": 223,
"y": 109
}
]
},
"paragraphs": [
{
"boundingBox": {
"vertices": [
{
"x": 223,
"y": 83
},
{
"x": 280,
"y": 84
},
{
"x": 280,
"y": 110
},
{
"x": 223,
"y": 109
}
]
},
"words": [
{
"boundingBox": {
"vertices": [
{
"x": 223,
"y": 83
},
{
"x": 280,
"y": 84
},
{
"x": 280,
"y": 110
},
{
"x": 223,
"y": 109
}
]
},
"symbols": [
{
"boundingBox": {
"vertices": [
{
"x": 223,
"y": 89
},
{
"x": 242,
"y": 89
},
{
"x": 242,
"y": 108
},
{
"x": 223,
"y": 108
}
]
},
"text": "m"
},
{
"boundingBox": {
"vertices": [
{
"x": 246,
"y": 88
},
{
"x": 259,
"y": 88
},
{
"x": 259,
"y": 108
},
{
"x": 246,
"y": 108
}
]
},
"text": "o"
},
{
"boundingBox": {
"vertices": [
{
"x": 262,
"y": 83
},
{
"x": 264,
"y": 83
},
{
"x": 264,
"y": 109
},
{
"x": 262,
"y": 109
}
]
},
"text": "i"
},
{
"property": {
"detectedBreak": {
"type": "EOL_SURE_SPACE"
}
},
"boundingBox": {
"vertices": [
{
"x": 269,
"y": 89
},
{
"x": 280,
"y": 89
},
{
"x": 280,
"y": 108
},
{
"x": 269,
"y": 108
}
]
},
"text": "s"
}
]
}
]
}
],
"blockType": "TEXT"
},
{
"boundingBox": {
"vertices": [
{
"x": 12,
"y": 122
},
{
"x": 81,
"y": 122
},
{
"x": 82,
"y": 206
},
{
"x": 13,
"y": 206
}
]
},
"paragraphs": [
{
"boundingBox": {
"vertices": [
{
"x": 12,
"y": 122
},
{
"x": 81,
"y": 122
},
{
"x": 82,
"y": 206
},
{
"x": 13,
"y": 206
}
]
},
"words": [
{
"boundingBox": {
"vertices": [
{
"x": 12,
"y": 122
},
{
"x": 81,
"y": 122
},
{
"x": 81,
"y": 179
},
{
"x": 12,
"y": 179
}
]
},
"symbols": [
{
"boundingBox": {
"vertices": [
{
"x": 12,
"y": 122
},
{
"x": 43,
"y": 122
},
{
"x": 43,
"y": 175
},
{
"x": 12,
"y": 175
}
]
},
"text": "1"
},
{
"property": {
"detectedBreak": {
"type": "EOL_SURE_SPACE"
}
},
"boundingBox": {
"vertices": [
{
"x": 50,
"y": 122
},
{
"x": 81,
"y": 122
},
{
"x": 81,
"y": 179
},
{
"x": 50,
"y": 179
}
]
},
"text": "2"
}
]
},
{
"boundingBox": {
"vertices": [
{
"x": 19,
"y": 177
},
{
"x": 76,
"y": 176
},
{
"x": 76,
"y": 205
},
{
"x": 19,
"y": 206
}
]
},
"symbols": [
{
"boundingBox": {
"vertices": [
{
"x": 19,
"y": 186
},
{
"x": 38,
"y": 186
},
{
"x": 38,
"y": 205
},
{
"x": 19,
"y": 205
}
]
},
"text": "m"
},
{
"boundingBox": {
"vertices": [
{
"x": 42,
"y": 186
},
{
"x": 55,
"y": 186
},
{
"x": 55,
"y": 206
},
{
"x": 42,
"y": 206
}
]
},
"text": "o"
},
{
"boundingBox": {
"vertices": [
{
"x": 58,
"y": 177
},
{
"x": 60,
"y": 177
},
{
"x": 60,
"y": 205
},
{
"x": 58,
"y": 205
}
]
},
"text": "i"
},
{
"property": {
"detectedBreak": {
"type": "EOL_SURE_SPACE"
}
},
"boundingBox": {
"vertices": [
{
"x": 65,
"y": 186
},
{
"x": 76,
"y": 186
},
{
"x": 76,
"y": 205
},
{
"x": 65,
"y": 205
}
]
},
"text": "s"
}
]
}
]
}
],
"blockType": "TEXT"
}
]
}
],
"text": "24\nmois\n12\nmois\n"
}
}
]
}
Can you please help me ?
Thank you all :)

Answer 1

Both responses and textAnnotations are arrays, so as far as i remember, you have to either loop through them, or access the first response element's first textAnnotation like so: responses[0].textAnnotations[0].description
I suggest looping if possible.

Answer 2

If you want all the descriptions under .responses[].textAnnotations you could write:
.responses[].textAnnotations[].description
which is short for:
.responses[] | .textAnnotations[] |.description
which is effectively a "for" loop within a "for" loop.