write_barcodes.json

The JSON file of the “Every Linear Barcode on One Page” example. Nine barcodes from the workshop, the warehouse, the till, the blood bank and the book trade, each printed above the text a scanner reads back from it.

JSON 182 lines

This file is a request: an application sends it over the network to the server, which creates the PDF and sends it back. It creates the same page as the Rust and Python versions of this example. A request names every file it uses, never its content; the call carries the request and the files together. A font the server already holds, such as DejaVuSans, is named with nothing attached. Send the request to the address the API page gives.

What This Example Is For

A workshop, a warehouse and a till do not read the same stripes. The label on a storage bay is Code 39, the outer case a shop takes delivery of is ITF-14, a blood bag is Codabar, a magazine carries its issue number in a small block beside its main code. A label printed in the wrong family is a label the scanner at the far end does not read at all, and somebody types the number in by hand.

What This Example Shows

Download the File The same example in Rust The same example in Python See What It Creates 
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{
  "metadata": {
    "title": "The linear barcodes a request can ask for by name"
  },
  "items": [
    {
      "type": "text",
      "rect": {"llx": 72, "lly": 794, "urx": 523.276, "ury": 813.2},
      "content": [
        "The barcodes a workshop, a warehouse and a till read"
      ],
      "font": "DejaVuSans",
      "font_size": 16
    },
    {
      "type": "text",
      "rect": {"llx": 72, "lly": 770, "urx": 523.276, "ury": 782.6},
      "content": [
        "Each box below is one module to the point, so every bar edge lands on a whole"
      ],
      "font": "DejaVuSans",
      "font_size": 10.5
    },
    {
      "type": "text",
      "rect": {"llx": 72, "lly": 755, "urx": 523.276, "ury": 767.6},
      "content": [
        "pixel of a printer. Under each code is what a scanner reads back from it."
      ],
      "font": "DejaVuSans",
      "font_size": 10.5
    },
    {
      "type": "barcode",
      "symbology": "code39",
      "content": "BAY 12-A",
      "rect": {"llx": 72, "lly": 690, "urx": 251, "ury": 730}
    },
    {
      "type": "text",
      "rect": {"llx": 72, "lly": 672, "urx": 523.276, "ury": 684},
      "content": [
        "Code 39, the workshop label: BAY 12-A"
      ],
      "font": "DejaVuSans",
      "font_size": 9
    },
    {
      "type": "barcode",
      "symbology": "code39",
      "content": "159",
      "check_digit": true,
      "rect": {"llx": 72, "lly": 618, "urx": 187, "ury": 658}
    },
    {
      "type": "text",
      "rect": {"llx": 72, "lly": 600, "urx": 523.276, "ury": 612},
      "content": [
        "Code 39 carrying its modulo 43 check character: 159F"
      ],
      "font": "DejaVuSans",
      "font_size": 9
    },
    {
      "type": "barcode",
      "symbology": "code93",
      "content": "BAY 12-A",
      "rect": {"llx": 72, "lly": 546, "urx": 201, "ury": 586}
    },
    {
      "type": "text",
      "rect": {"llx": 72, "lly": 528, "urx": 523.276, "ury": 540},
      "content": [
        "Code 93, the same text in half the room: BAY 12-A"
      ],
      "font": "DejaVuSans",
      "font_size": 9
    },
    {
      "type": "barcode",
      "symbology": "itf14",
      "content": "00012345678905",
      "rect": {"llx": 72, "lly": 474, "urx": 227, "ury": 514}
    },
    {
      "type": "text",
      "rect": {"llx": 72, "lly": 456, "urx": 523.276, "ury": 468},
      "content": [
        "ITF-14, the outer case a shop takes delivery of: 00012345678905"
      ],
      "font": "DejaVuSans",
      "font_size": 9
    },
    {
      "type": "barcode",
      "symbology": "codabar",
      "content": "A31600$D",
      "rect": {"llx": 72, "lly": 402, "urx": 191, "ury": 442}
    },
    {
      "type": "text",
      "rect": {"llx": 72, "lly": 384, "urx": 523.276, "ury": 396},
      "content": [
        "Codabar, the blood bag and the borrower's card: A31600$D"
      ],
      "font": "DejaVuSans",
      "font_size": 9
    },
    {
      "type": "barcode",
      "symbology": "upc_e",
      "content": "01234565",
      "rect": {"llx": 72, "lly": 330, "urx": 143, "ury": 370}
    },
    {
      "type": "text",
      "rect": {"llx": 72, "lly": 312, "urx": 523.276, "ury": 324},
      "content": [
        "UPC-E, the small North American package: 01234565"
      ],
      "font": "DejaVuSans",
      "font_size": 9
    },
    {
      "type": "barcode",
      "symbology": "ean13",
      "content": "9780201379624",
      "rect": {"llx": 72, "lly": 258, "urx": 187, "ury": 298}
    },
    {
      "type": "barcode",
      "symbology": "add_on2",
      "content": "53",
      "rect": {"llx": 176, "lly": 258, "urx": 216, "ury": 298}
    },
    {
      "type": "text",
      "rect": {"llx": 72, "lly": 240, "urx": 523.276, "ury": 252},
      "content": [
        "A magazine, its issue number in a two-digit add-on: 9780201379624 53"
      ],
      "font": "DejaVuSans",
      "font_size": 9
    },
    {
      "type": "barcode",
      "symbology": "ean13",
      "content": "9781234567897",
      "rect": {"llx": 72, "lly": 186, "urx": 187, "ury": 226}
    },
    {
      "type": "barcode",
      "symbology": "add_on5",
      "content": "51999",
      "rect": {"llx": 176, "lly": 186, "urx": 243, "ury": 226}
    },
    {
      "type": "text",
      "rect": {"llx": 72, "lly": 168, "urx": 523.276, "ury": 180},
      "content": [
        "A book, the price its publisher suggests in a five-digit add-on: 9781234567897 51999"
      ],
      "font": "DejaVuSans",
      "font_size": 9
    },
    {
      "type": "barcode",
      "symbology": "data_bar",
      "content": "00012345678905",
      "rect": {"llx": 72, "lly": 114, "urx": 188, "ury": 154}
    },
    {
      "type": "text",
      "rect": {"llx": 72, "lly": 96, "urx": 523.276, "ury": 108},
      "content": [
        "GS1 DataBar, the loose cut of meat and the small pack: 00012345678905"
      ],
      "font": "DejaVuSans",
      "font_size": 9
    }
  ]
}